Flow Measurement and Instrumentation最新文献

Multi-objective optimization of DBD plasma actuator characteristics for turbulent flow separation control over airfoils 用于翼型湍流分离控制的DBD等离子体驱动器特性多目标优化

IF 2.3 3区工程技术

Flow Measurement and Instrumentation Pub Date : 2025-05-27 DOI: 10.1016/j.flowmeasinst.2025.102951

A. Rahni, A. Jahangirian

{"title":"Multi-objective optimization of DBD plasma actuator characteristics for turbulent flow separation control over airfoils","authors":"A. Rahni, A. Jahangirian","doi":"10.1016/j.flowmeasinst.2025.102951","DOIUrl":"10.1016/j.flowmeasinst.2025.102951","url":null,"abstract":"<div><div>The optimal characteristics of a plasma actuator for effective control of high Reynolds number turbulent flow separation around airfoils are investigated. The actuator position on the airfoil and its voltage are chosen as variable parameters. A multi-objective optimization using a Genetic Algorithm is used with two objective functions of maximizing aerodynamic efficiency and minimizing power consumption. The numerical simulation of the plasma actuator effect on the flow is carried out using Maxwell equations for the electro-hydrodynamic (EHD) field coupled with Reynolds Averaged Navier-Stokes equations through the Suzen model. An algorithm is developed to automatically adjust the actuator position, generate the mesh, and analyze the flow for a Reynolds number of one million. A detailed analysis of the results revealed that the actuator position significantly impacts aerodynamic efficiency, depending on the airfoil type and voltage applied to the actuator. Further study is carried out to investigate the separation control by plasma actuator over two airfoils with similar thicknesses, i.e., NACA0012 and NACA4412. Results indicated that the optimal actuator position for the symmetric airfoil is the leading edge, while that of the cambered airfoil (NACA4412) is near the middle of the airfoil. Furthermore, increasing the voltage beyond a specific threshold results in a rise in the drag coefficient, thereby diminishing the aerodynamic efficiency. The optimization analysis ultimately demonstrated that the peak aerodynamic efficiency for NACA0012 and NACA4412 airfoils is achieved at distinct voltage levels, specifically 18 kV and 21–22 kV, respectively.</div></div>","PeriodicalId":50440,"journal":{"name":"Flow Measurement and Instrumentation","volume":"105 ","pages":"Article 102951"},"PeriodicalIF":2.3,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144169512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of flow field simulation and pulsation performance of non-circular gear hydraulic motor 非圆齿轮液压马达流场仿真及脉动特性研究

IF 2.3 3区工程技术

Flow Measurement and Instrumentation Pub Date : 2025-05-26 DOI: 10.1016/j.flowmeasinst.2025.102954

Yongping Liu , Linyue Wu , Fuqiang Wang , Changbin Dong

{"title":"Investigation of flow field simulation and pulsation performance of non-circular gear hydraulic motor","authors":"Yongping Liu , Linyue Wu , Fuqiang Wang , Changbin Dong","doi":"10.1016/j.flowmeasinst.2025.102954","DOIUrl":"10.1016/j.flowmeasinst.2025.102954","url":null,"abstract":"<div><div>The non-circular gear hydraulic motor is widely used in hydraulic transmission systems for mining and underground machinery, owing to its low velocity, high output torque, and compact structure. This paper focuses on the 4–6 type non-circular gear hydraulic motor as the research object. The influence of the coupling between the motor's internal flow field and the operation of the gear train on the motor's power pulsation performance is analysed using the mesh and particle-based methods. A three-dimensional fluid model of the motor is developed to systematically investigate the effects of pressure and flow velocity on the motor's stability. With regard to the pulsation rate of the motor, this study analyses the comparative relationship between the theoretical torque pulsation rate and the theoretical flow pulsation rate, while simultaneously considering the variation of the flow pulsation rate under the influence of oil entrapment in the gear teeth. The results show that the theoretical flow pulsation rate of the motor is basically consistent with the theoretical torque pulsation rate. However, when considering the oil entrapment in the motor gear teeth, the flow pulsation rate increases. In the flow field simulation, the flow velocity distribution in the flow field is found to be uneven. Specifically, high-velocity flow is formed in the air gap area, while in the area close to the sun gear and the inner gear ring, the flow is poor and stagnation phenomena occur, which aggravates the oil entrapment phenomenon. The findings of this study provide a theoretical basis for optimizing the performance of non-circular gear hydraulic motors and offer new insights into the simulation analysis of complex moving flow field, as well as the relationship between flow pulsation rate and oil entrapment characteristics.</div></div>","PeriodicalId":50440,"journal":{"name":"Flow Measurement and Instrumentation","volume":"105 ","pages":"Article 102954"},"PeriodicalIF":2.3,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144169511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel super-twisting sliding mode control structure incorporating fuzzy logic for fuel regulator applications 基于模糊逻辑的超扭滑模控制结构在燃油调节器中的应用

IF 2.3 3区工程技术

Flow Measurement and Instrumentation Pub Date : 2025-05-22 DOI: 10.1016/j.flowmeasinst.2025.102947

Jun-Zheng Qi , Wei-Wei Liu , Yang Wang , Hai-Xing Zhang , Jian-Rong Song , Huan-Qiang Liu , Zai-Lin Guo

{"title":"A novel super-twisting sliding mode control structure incorporating fuzzy logic for fuel regulator applications","authors":"Jun-Zheng Qi , Wei-Wei Liu , Yang Wang , Hai-Xing Zhang , Jian-Rong Song , Huan-Qiang Liu , Zai-Lin Guo","doi":"10.1016/j.flowmeasinst.2025.102947","DOIUrl":"10.1016/j.flowmeasinst.2025.102947","url":null,"abstract":"<div><div>To address the pronounced fuel supply fluctuations in afterburner fuel regulators, this study proposes a precision control strategy targeting the core metering valve. By integrating the servo valve and metering valve into a valve-controlled hydraulic cylinder system, a transfer function model is established to characterize the system dynamics. A hybrid control framework is developed, combining a super-twisting sliding mode controller (STC) with adaptive fuzzy logic to dynamically adjust sliding mode switching terms. This approach enables disturbance-adaptive regulation of the valve spool position, ensuring rapid tracking of reference signals while significantly reducing displacement errors. The integration of fuzzy logic with an optimized exponential term in the sliding variable further suppresses chattering phenomena, enhancing robustness without compromising tracking agility. These advancements provide a viable solution for high-precision fuel metering in military aeroengines, particularly in scenarios demanding stringent thrust stability and rapid dynamic response.</div></div>","PeriodicalId":50440,"journal":{"name":"Flow Measurement and Instrumentation","volume":"105 ","pages":"Article 102947"},"PeriodicalIF":2.3,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144146979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of ResNet and Autoencoder models for anomaly detection in wastewater networks data: A Comparative study of supervised and unsupervised approaches ResNet和Autoencoder模型在污水管网数据异常检测中的应用：有监督和无监督方法的比较研究

IF 2.3 3区工程技术

Flow Measurement and Instrumentation Pub Date : 2025-05-19 DOI: 10.1016/j.flowmeasinst.2025.102946

I. Zidaoui , C. Wemmert , C. Joannis , S. Isel , J. Wertel , J. Vazquez

{"title":"Application of ResNet and Autoencoder models for anomaly detection in wastewater networks data: A Comparative study of supervised and unsupervised approaches","authors":"I. Zidaoui , C. Wemmert , C. Joannis , S. Isel , J. Wertel , J. Vazquez","doi":"10.1016/j.flowmeasinst.2025.102946","DOIUrl":"10.1016/j.flowmeasinst.2025.102946","url":null,"abstract":"<div><div>Artificial intelligence (AI) enhances data validation for urban wastewater networks by addressing inaccuracies in sensor-generated data from harsh environments. Traditional manual validation methods are labor-intensive and prone to human error, necessitating automated solutions. The performance of two AI-driven models— a supervised ResNet model and an unsupervised Autoencoder—was compared on turbidity data issued from an urban wastewater network. The ResNet model showed improved accuracy when the classification threshold was optimized using the Precison-Recall curve but required rigorous data validation to manage learning bias and class imbalance. The Autoencoder achieved an F1 score of 0.96, demonstrating its efficacy in detecting anomalies when trained on valid data sequences. Hence, AI models significantly reduce the workload of manual data validation, enhance the reliability of water management systems, and allow stakeholders to focus on more critical tasks.</div></div>","PeriodicalId":50440,"journal":{"name":"Flow Measurement and Instrumentation","volume":"105 ","pages":"Article 102946"},"PeriodicalIF":2.3,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144099075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coding-free virtual flowmeter for building chilled water using pump VFD data and LLM 基于泵VFD数据和LLM的建筑冷冻水免编码虚拟流量计

IF 2.3 3区工程技术

Flow Measurement and Instrumentation Pub Date : 2025-05-15 DOI: 10.1016/j.flowmeasinst.2025.102943

Shunian Qiu , Fan Feng , Xuanzhe Zhang , Siyuan Xu , Qian Wu

{"title":"Coding-free virtual flowmeter for building chilled water using pump VFD data and LLM","authors":"Shunian Qiu , Fan Feng , Xuanzhe Zhang , Siyuan Xu , Qian Wu","doi":"10.1016/j.flowmeasinst.2025.102943","DOIUrl":"10.1016/j.flowmeasinst.2025.102943","url":null,"abstract":"<div><div>With the development of artificial intelligence technologies, large language models (LLMs) have been adopted by an increasing number of researchers as assistants. With additional extensions, such as Wolfram Alpha, web search engine and code interpreters, LLMs are promising to enable data-driven modelling without manual coding. In building HVAC (heating, ventilation and air-conditioning) systems, chilled water flow rate is a critical variable for real-time optimal control of HVAC systems. Typically, the flow rate is measured by an on-site flowmeter. Due to the vulnerability of flowmeters, various methods have been developed to predict the real-time flow rate with other monitored variables (i.e., virtual flowmeter), as a supplement to the flowmeter reading. To develop a virtual flowmeter with minimal manual coding effort, this study proposes an approach based on LLMs and pump variable frequency drive (VFD) data to model and predict chilled water flow rate. Three conventional modelling methods were manually implemented for comparison. When predicting chilled water flow rate using the proposed approach (with Doubao), the root mean square error (RMSE) is below 9.05 m<sup>3</sup>/h, which is slightly higher than the result of artificial random forest method (8.70 m<sup>3</sup>/h), but lower than the results of artificial physical model (11.28 m<sup>3</sup>/h) and artificial KNN (15.69 m<sup>3</sup>/h). Hence, it is verified that the accuracy performance of the proposed approach is comparable to conventional methods, within the acceptable criteria. Moreover, the proposed approach outperformed the conventional methods on reducing manual labor on coding.</div></div>","PeriodicalId":50440,"journal":{"name":"Flow Measurement and Instrumentation","volume":"105 ","pages":"Article 102943"},"PeriodicalIF":2.3,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Flow characteristics prediction of the tri-eccentric butterfly valve based on the Multi-Scale Fusion Attention method and Kolmogorov-Arnold network 基于多尺度融合注意法和Kolmogorov-Arnold网络的三偏心蝶阀流量特性预测

IF 2.3 3区工程技术

Flow Measurement and Instrumentation Pub Date : 2025-05-07 DOI: 10.1016/j.flowmeasinst.2025.102934

Xinliang Yang , Yanjun Lü , Le Xu , Yushan Ma , Ruibo Chen , Qingan Li

{"title":"Flow characteristics prediction of the tri-eccentric butterfly valve based on the Multi-Scale Fusion Attention method and Kolmogorov-Arnold network","authors":"Xinliang Yang , Yanjun Lü , Le Xu , Yushan Ma , Ruibo Chen , Qingan Li","doi":"10.1016/j.flowmeasinst.2025.102934","DOIUrl":"10.1016/j.flowmeasinst.2025.102934","url":null,"abstract":"<div><div>The tri-eccentric butterfly valve is widely used in the petrochemical, energy, and other industries. The flow coefficient and hydrodynamic torque are key parameters of the tri-eccentric butterfly valve. Rapid and accurate prediction of these parameters can improve the control accuracy of fluid flow and ensure the efficient and stable operation of the valve. Deep learning techniques offer a promising approach for predicting flow characteristics. This paper proposed a novel network structure based on the Multi-Scale Fusion Attention module (MSFA) and Kolmogorov-Arnold networks (KAN) to predict the flow coefficient and hydrodynamic torque. The proposed MSFA module enhances the multi-scale perception ability and integrates both high-level and low-level features to improve information representation. The KAN network replaces the linear weights and activation functions of Multilayer Perceptron (MLP) with learnable B-spline basis functions, which enhances regression prediction performance. The results indicate that the proposed MSFA module effectively improves both the prediction accuracy and convergence of base models such as MLP and KAN. The MSFA-KAN model achieves a mean absolute percentage error (MAPE) of 2.61 %.</div></div>","PeriodicalId":50440,"journal":{"name":"Flow Measurement and Instrumentation","volume":"105 ","pages":"Article 102934"},"PeriodicalIF":2.3,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143917461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

2D digital proportional flow valve and characteristic analysis 二维数字比例流量阀及其特性分析

IF 2.3 3区工程技术

Flow Measurement and Instrumentation Pub Date : 2025-05-06 DOI: 10.1016/j.flowmeasinst.2025.102932

Quanchao Dai, Jiake Wang, Chengtao Zhu, Sheng Li, Wenang Jia

{"title":"2D digital proportional flow valve and characteristic analysis","authors":"Quanchao Dai, Jiake Wang, Chengtao Zhu, Sheng Li, Wenang Jia","doi":"10.1016/j.flowmeasinst.2025.102932","DOIUrl":"10.1016/j.flowmeasinst.2025.102932","url":null,"abstract":"<div><div>The development of hydraulic components is trending toward lightweight, high precision, high flow rates, strong contamination resistance, and low leakage. A novel 2D digital proportional flow valve is proposed, the high- and low-pressure grooves on the spool, combined with the inclined groove on the sleeve, form a hydraulic damping half-bridge that controls the pressure difference at both ends of the spool based on its rotational angle. The operating principle of the valve was detailed, and a mathematical model was derived. Based on the model, stability analysis was conducted for different key structural parameters. A co-simulation model using Simulink, AMESim, and Adams was built to investigate the effects of various structural parameters on the main valve's performance. Finally, a prototype was manufactured and subjected to performance testing. The prototype weighs approximately 941 g. Under a system pressure of 14 MPa and full-scale input, it achieves a hysteresis of 4.6 %, a linearity of 7 %, a maximum leakage of 0.26 L/min, a step response time of 39 ms, an amplitude bandwidth of 16 Hz, and a phase bandwidth of 17 Hz. The 2D digital proportional flow valve features a simple structure, low leakage, high power-to-weight ratio, and excellent control accuracy and response speed, making it a suitable solution.</div></div>","PeriodicalId":50440,"journal":{"name":"Flow Measurement and Instrumentation","volume":"105 ","pages":"Article 102932"},"PeriodicalIF":2.3,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hardware acceleration of electromagnetic tomography image reconstruction based on FPGA 基于FPGA的电磁层析成像图像重建硬件加速

IF 2.3 3区工程技术

Flow Measurement and Instrumentation Pub Date : 2025-05-06 DOI: 10.1016/j.flowmeasinst.2025.102923

Qingli Zhu , Yong Li , Ze Liu

{"title":"Hardware acceleration of electromagnetic tomography image reconstruction based on FPGA","authors":"Qingli Zhu , Yong Li , Ze Liu","doi":"10.1016/j.flowmeasinst.2025.102923","DOIUrl":"10.1016/j.flowmeasinst.2025.102923","url":null,"abstract":"<div><div>Electromagnetic tomography faces significant challenges due to its ill-posed and nonlinear inverse problem, which impairs image reconstruction quality and increases computational cost. This paper proposes an efficient deep learning-based image reconstruction method, accelerated by a customized convolutional neural network implemented on FPGA, where traditional fully connected layers are replaced with convolutional layers. A high-quality dataset was generated through joint simulation with COMSOL and MATLAB to train the model. Convolution and pooling operations were implemented as hardware IP cores via high-level synthesis, ensuring efficient execution on FPGA’s programmable logic. The design was implemented and validated on Xilinx Zynq-7000 system-on-chip. Experimental results show a 30.5% reduction in execution time compared to an ARM-based implementation, while achieving high reconstruction accuracy with an average relative error of 0.4503 and a correlation coefficient of 0.8632. These results highlight the potential of the proposed method for enabling real-time and online imaging in practical electromagnetic tomography applications.</div></div>","PeriodicalId":50440,"journal":{"name":"Flow Measurement and Instrumentation","volume":"105 ","pages":"Article 102923"},"PeriodicalIF":2.3,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143917459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Wake characteristics of a circular cylinder with a short flat plate at an angle in one of the separated shear layers 在一个分离剪切层中夹角有短平板的圆柱的尾迹特性

IF 2.3 3区工程技术

Flow Measurement and Instrumentation Pub Date : 2025-05-03 DOI: 10.1016/j.flowmeasinst.2025.102931

Balwant N. Bhasme , Shailendra D. Sharma

{"title":"Wake characteristics of a circular cylinder with a short flat plate at an angle in one of the separated shear layers","authors":"Balwant N. Bhasme , Shailendra D. Sharma","doi":"10.1016/j.flowmeasinst.2025.102931","DOIUrl":"10.1016/j.flowmeasinst.2025.102931","url":null,"abstract":"<div><div>The flow over the circular cylinder and its wake is an important topic for many investigators because of its practical importance in engineering applications. It is a well-known fact that a plate at an angle of attack generates circulation. By keeping a flat plate in the wake at an angle of attack, its effect on the wake has not been studied. In the present investigation, a short flat plate is placed in one of the separated shear layers behind the circular cylinder to see its effect on the wake structure.</div><div>The investigation is carried out in three phases. Initially, flow visualization is done by colour dye injection method at <em>R</em><sub><em>e</em></sub> = 650; in the second phase, the surface pressure measurements are done by using surface pressure taps and manometers at <em>R</em><sub><em>e</em></sub> = 19300 and in the third phase, the wake measurements are done by using two-dimensional particle image velocimetry technique at <em>R</em><sub><em>e</em></sub> = 19300. The plate is placed asymmetrically at various angles, and it is moved at two streamwise locations, <em>G/D</em> = 0.5 and 1. The effect of a short flat plate on the suppression of vortex shedding, reduction of drag and changes in the wake structure is studied in the present investigation. It is seen from the flow visualization results that at a lower Reynolds number, a short flat plate suppresses the vortex shedding. At higher Reynolds number, pressure measurements show a considerable reduction in drag of 21 % for a short plate angle of <em>α</em> = 12 at <em>G/D</em> = 0.5. The turbulent kinetic energy and the Reynolds stresses, both normal and shear, decrease sharply in comparison with those for the bare cylinder by 47 %, 50 %, and 53 %, respectively.</div></div>","PeriodicalId":50440,"journal":{"name":"Flow Measurement and Instrumentation","volume":"105 ","pages":"Article 102931"},"PeriodicalIF":2.3,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143917460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Innovative modeling of discharge coefficients for rectangular C-type piano key side weirs using GPR-POA and LSTM techniques 基于GPR-POA和LSTM技术的矩形c型钢琴键边堰流量系数创新建模

IF 2.3 3区工程技术

Flow Measurement and Instrumentation Pub Date : 2025-05-02 DOI: 10.1016/j.flowmeasinst.2025.102924

Yaser Mehri , Mohsen Nasrabadi

{"title":"Innovative modeling of discharge coefficients for rectangular C-type piano key side weirs using GPR-POA and LSTM techniques","authors":"Yaser Mehri , Mohsen Nasrabadi","doi":"10.1016/j.flowmeasinst.2025.102924","DOIUrl":"10.1016/j.flowmeasinst.2025.102924","url":null,"abstract":"<div><div>The rectangular piano key side weirs (RPKSW) usually use and install in the outer arch of the channels, which is a convenient location for side weirs. As well, the calculation of the discharge coefficient (C<sub>d</sub>) in the weirs is of particular importance in their proper design. Accordingly, in the present study, first, the number of 239 experiments were performed on C-Type RPKSW at two arc angles of 30 and 120°. First, two data-mining models of Gaussian Process Regression (GPR) and Long Short-Term Memory (LSTM) were utilized for modelling. Then, the data-mining models were developed using the Pelican Optimization Algorithm (POA) to enhance the discharge coefficient predictions of basic models. By evaluating these models, it was found that the optimization (POA) performed on GPR was effective and caused a reduction in the prediction error of the weir discharge coefficient. The parameters of α, p<sub>d</sub>/B, L/R<sub>c</sub>, P/h<sub>1</sub>, L/b, and F<sub>1</sub> were identified as effective parameters on the weir discharge coefficient. Due to data normalization, the range of all data was set between 0 and 1. In this study, the best model was the GPR-POA model with RMSE = 0.0486, R<sup>2</sup> = 0.9388, and KGE = 0.9533. The GPR and LSTM models were ranked after the GPR-POA model. By evaluating the results of different combinations in modeling, it was determined that P/h<sub>1</sub> and p<sub>d</sub>/B ratios had a greater effect in providing correct results. Unlike three parameters of L/b, Fr, and L/R, three parameters of α, p<sub>d</sub>/B, and P/h<sub>1</sub> had a great impact on the accuracy of the model, so without these parameters, the model accuracy decreased significantly.</div></div>","PeriodicalId":50440,"journal":{"name":"Flow Measurement and Instrumentation","volume":"105 ","pages":"Article 102924"},"PeriodicalIF":2.3,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143906239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0