Propulsion and Power Research最新文献

{"title":"Ramp-type heating in a thermoelastic semiconductor medium under coupled plasma and thermal with gravity and initial stress effects","authors":"Kawther K. Alarfaj,&nbsp;A.F. Al-Hazaemh,&nbsp;A.M. Abd-Alla","doi":"10.1016/j.jppr.2026.05.004","DOIUrl":"10.1016/j.jppr.2026.05.004","url":null,"abstract":"<div><div>The present investigation deals with the two-dimensional deformation in a semi-infinite thermoelastic semiconducting medium subjected to ramp-type heating in the presence of gravity field and initial stress. The medium is modelled as a coupled plasma-thermoelastic system, where the deformation is induced by a ramp-type heat source applied along the free surface. The governing equations, based on the thermoelastic semiconductor framework, account for ramp-type heating, thermal conduction, gravity field and initial stress, providing a comprehensive description of the medium’s behavior. By employing the normal mode analysis and eigenvalue approach, exact expressions for displacement components, stress distributions, temperature profiles, and carrier density are obtained. The numerical “simulations in Mathematica software illustrate how time, gravity field, and initial stress, thermoeleasting coupling, and ramp-type heating on the physical quantities is illustrated graphically and discussed in detail. A graphic comparison of our physical quantity accuracy results with earlier studies shows the significant influence of external conditions on ram-type heating phenomena. These findings highlight the complex interplay of multi-physical effects and offer insights for optimizing wave control in thermoelastic semiconductor medium and multifunctional materials, with potential applications in materials science, geophysics, and advanced engineering systems.</div></div>","PeriodicalId":51341,"journal":{"name":"Propulsion and Power Research","volume":"15 3","pages":"Pages 537-550"},"PeriodicalIF":6.7,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148856269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of bio-thermoelastic interaction in porous viscoelastic tissues based on the Green-Naghdi GNIII model","authors":"Zuhur Alqahtani,&nbsp;Ibrahim Abbas,&nbsp;Areej Almuneef","doi":"10.1016/j.jppr.2026.09.001","DOIUrl":"10.1016/j.jppr.2026.09.001","url":null,"abstract":"<div><div>This work investigates heating-transfer phenomena and their mechanical effects during thermal treatments by analyzing porous viscoelastic biological tissues' behaviors at extreme temperatures and under mechanical duress. We develop a framework where biological tissues' heating transfer is described using a non-Fourier heat conduction model with energy dissipation and without it (Green-Naghdi Type III (GNIII)). Using a Laplace transform and eigenvalue technique, we obtain analytical solutions in the form of temperature, mechanical displacement, volume fraction of the voids, and stress fields, as a function of time. The temperature profile is then used as an initial condition for mechanical simulations. Pulsed heat flux’ characteristic duration is varied for the numerical evaluation of the bioheat system GNIII model. The system's response is predicted based on classical Fourier conduction. The predictive response is then compared with the response predicted with the GNIII model. The GNIII model is applied and shows the predictive response to the bioheat for the non-steady state. The results show discrepancies compared to predictive responses using classic Fourier conduction, confirming the significance of the GNIII model.</div></div>","PeriodicalId":51341,"journal":{"name":"Propulsion and Power Research","volume":"15 3","pages":"Pages 689-698"},"PeriodicalIF":6.7,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149044660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Machine learning enhancement of electromagnetic thermal bioconvective effects in Darcy-Forchheimer peristaltic transport of advanced tetra-hybrid nanofluids","authors":"Mingliang Zheng,&nbsp;Mohamed Kallel,&nbsp;Nouman Ijaz,&nbsp;Ahmed Zeeshan,&nbsp;Imran Ejaz,&nbsp;Nada Ahmed","doi":"10.1016/j.jppr.2026.04.005","DOIUrl":"10.1016/j.jppr.2026.04.005","url":null,"abstract":"<div><h3>Significance of the study</h3><div>Precision drug delivery in biological microvasculature remains a critical challenge in nanomedicine, where controlling heat and mass transfer through non-Newtonian nanofluid flows offers transformative potential for the development of smart, heat-activated therapeutic systems. <em>Aim of the study:</em> This study aims to investigate the electroosmotic peristaltic flow of a Casson-based Tetra-hybrid nanofluid through biological microchannels, examining how electroosmotic forces, magnetic fields, Joule heating, and laser irradiation collectively modulate nanoparticle transport and drug release efficiency. <em>Research methodology:</em> A multi-physics computational framework integrating AI-neural networks with electrokinetic analysis is employed, incorporating viscous dissipation, nonlinear mixed convection with the governing nonlinear partial differential equations solved numerically using Mathematica 13.2's NDSolve command. <em>Conclusion:</em> Results demonstrate that electroosmotic forces significantly enhance nanoparticle transport efficiency during peristaltic motion mapping identifies critical zones of thermal and viscous energy dissipation, and the Tetra-hybrid nanofluid configuration exhibits superior thermal management performance compared to Mono- and Tri-hybrid alternatives. Furthermore, the combined laser irradiation and Joule heating effects confirm the feasibility of controlled, heat-triggered drug release, establishing this framework as a viable computational strategy for designing intelligent, non-invasive nano-bio therapeutic systems.</div></div>","PeriodicalId":51341,"journal":{"name":"Propulsion and Power Research","volume":"15 3","pages":"Pages 618-649"},"PeriodicalIF":6.7,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148953997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of anti-icing characteristics for rotating spinners with hot air film","authors":"Wenhao Deng,&nbsp;Borong Qiu,&nbsp;Jianing Tao,&nbsp;Haiwang Li,&nbsp;Shengguang Chen,&nbsp;Pengfei Wang,&nbsp;Qiangshun Guan,&nbsp;Lan Ma,&nbsp;Yakang Xia,&nbsp;Xuan Gao","doi":"10.1016/j.jppr.2026.08.002","DOIUrl":"10.1016/j.jppr.2026.08.002","url":null,"abstract":"<div><div>When an aircraft flies through cumulonimbus clouds, ice accretion occurs on windward surfaces due to the impingement of supercooled water droplets, and threatens flight safety. This study proposes an ice accretion simulation method based on the thermal-fluid-structural coupling model, the phase-interface data exchange model, and the rotational forces model. This study conducted icing wind tunnel tests on a rotating spinner with a realistic hot air anti-icing configuration. The simulation employed the actual aero-engine bleed air method and realistic hot air boundary conditions, and the results were compared with experimental data to ensure model accuracy. The research demonstrates that applying the thermal-fluid-structural coupling model can accurately couple the effects of internal hot air impingement and external hot air film heating. The leading-edge hole effectively impinges on the [its temperature. The hot air film coverage is superior under the maximum state compared to the idle state. Regarding rotational effects, centrifugal and Coriolis forces are the dominant forces influencing water film flow. Under the idle state, the external hot air alters droplet trajectories, creating a relatively large droplet rarefied region and reducing the local water collection efficiency, thereby decreasing ice accretion. Under the maximum state, internal impingement heat transfer intensifies, leading to a significant temperature rise on the spinner surface, which in turn causes a marked reduction in ice accretion in areas with film holes.</div></div>","PeriodicalId":51341,"journal":{"name":"Propulsion and Power Research","volume":"15 3","pages":"Pages 669-688"},"PeriodicalIF":6.7,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149004871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Energy flow model-based safety analysis method for complex mechanical system","authors":"Yijian Ding,&nbsp;Yida Teng,&nbsp;Guo Li","doi":"10.1016/j.jppr.2026.06.004","DOIUrl":"10.1016/j.jppr.2026.06.004","url":null,"abstract":"<div><div>Predicting and identifying critical components of complex mechanical systems during the design phase is important for safety. However, traditional empirically based safety analysis is gradually inadequate due to the complexity of physical domains and requires model based and quantitative guidance. Therefore, an innovative method including nominal system and fault injection models based on energy flow and quantitative safety analysis is pro-posed in this paper. Specifically, the nominal model with multiple physical domains is generated based on energy flow between and within components, which could effectively reflect system characteristics and correlate with the design. Simultaneously, the fault injection model could deal with fault information and reflect to energy variation with directly injecting fault into the nominal model. Moreover, Logarithmic Safety Index (LSI) with physical meaning is proposed as the quantitative evaluation. Lower the LSI, the lower the safety. Eventually, the method is illustrated by aviation piston engine. Results show that the simulation and experimental error of the system model based on energy is less than 2.5%, which could effectively characterize the performance after fault injection. Furthermore, a total of 656 possible evolution paths for each component are automatically generated based on the model, and a total of 37 shortest evolution paths are determined based on LSI quantization. Based on the frequency of the evolution path nodes, the critical evolution components could be identified including the intercooler, turbo-charger, intake and exhaust pipes. Therefore, corresponding improvement strategies could be proposed for critical components, and the results show that the proposed method proposed could quantitatively evaluate the degree of safety improvement.</div></div>","PeriodicalId":51341,"journal":{"name":"Propulsion and Power Research","volume":"15 3","pages":"Pages 650-668"},"PeriodicalIF":6.7,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149004870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of the effects of equivalence ratio on combustion oscillation in scramjet combustors","authors":"Ye Tian,&nbsp;Yitong Zhao,&nbsp;Guangming Du,&nbsp;Wei Ran,&nbsp;Wen Shi","doi":"10.1016/j.jppr.2026.06.005","DOIUrl":"10.1016/j.jppr.2026.06.005","url":null,"abstract":"<div><div>The equivalence ratio (ER) plays a critical role in governing fuel combustion and combustion stability. However, its influence on the evolution of flame-flow-acoustic coupling under high-enthalpy conditions remains inadequately understood. This study investigates the combustion process in a supersonic combustor under varying equivalence ratios using experiments conducted in a ground-connected pulse-combustion wind tunnel. High-speed optical imaging and synchronized multi-point wall pressure measurements were employed to capture the spatiotemporal dynamics of flame oscillations. Modal decomposition and other analytical methods were utilized to identify the primary mechanisms driving combustion oscillations. Results revealed that, across all tested equivalence ratios, combustion oscillations were predominantly influenced by flow-induced mechanisms governing flame upstream propagation and downstream retreat. The dominant oscillation frequency decreased as the equivalence ratio increased, ranging from 228 Hz to 82 Hz. Additionally, as the equivalence ratio rose, the combustion oscillation mechanism became increasingly dominated by acoustic effects, accompanied by a notable enhancement in oscillation energy. Quantitative analysis using the Rayleigh index demonstrated a progressive strengthening of thermoacoustic feedback with increasing equivalence ratio. This study provides quantitative insights into how equivalence ratio affects combustion oscillation modes, frequency shifts, and the intensity of thermoacoustic coupling under high-enthalpy supersonic combustion conditions. These findings are crucial for designing combustion stability margins in scramjet engines, thereby contributing to the advancement of hypersonic vehicle technology.</div></div>","PeriodicalId":51341,"journal":{"name":"Propulsion and Power Research","volume":"15 3","pages":"Pages 551-571"},"PeriodicalIF":6.7,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148937000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Theoretical and numerical analysis of a thermodiffusive Timoshenko system with distributed delay and logarithmic damping: Well-posedness and stability results","authors":"Salah Boulaaras,&nbsp;Djamel Ouchenane","doi":"10.1016/j.jppr.2026.08.001","DOIUrl":"10.1016/j.jppr.2026.08.001","url":null,"abstract":"<div><div>In this paper, we investigate a one-dimensional thermoelastic Timoshenko system incorporating thermodiffusion effects, distributed delay, and a nonlinear logarithmic damping mechanism. The model couples the transverse displacement and rotation angle with the temperature and chemical potential, providing a comprehensive framework for analyzing the interaction between mechanical, thermal, and diffusive phenomena in elastic structures. We first establish the well-posedness of the system by reformulating it as an abstract Cauchy problem and applying semigroup theory together with suitable energy estimates. Next, we construct an appropriate Lyapunov functional that accounts for both the coupled thermo-mechanical structure and the distributed delay. A major analytical challenge arises from the weakly dissipative nature of the logarithmic damping, which degenerates near the equilibrium state and prevents the direct application of standard exponential stability techniques. To overcome this difficulty, we derive refined energy estimates leading to a nonlinear differential inequality that yields a polynomial decay rate for the total energy. Finally, numerical simulations are presented to validate the theoretical analysis. The computational results confirm the predicted polynomial decay behavior and illustrate the influence of the logarithmic damping and distributed delay on the long-time dynamics of the system. The present work extends existing results by providing a unified analytical and numerical framework that combines thermodiffusion, distributed delay, and weak nonlinear dissipation within a Timoshenko beam model.</div></div>","PeriodicalId":51341,"journal":{"name":"Propulsion and Power Research","volume":"15 3","pages":"Pages 572-617"},"PeriodicalIF":6.7,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148937001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fuzzy uncertainty modelling of micropolar nanofluid flow in a vertically rotating porous channel under magneto-thermal-electrical effects using a two-parameter HAM approach","authors":"Ajay Kumar,&nbsp;Ramakanta Meher","doi":"10.1016/j.jppr.2026.04.002","DOIUrl":"10.1016/j.jppr.2026.04.002","url":null,"abstract":"<div><div>This study presents a comprehensive investigation of micropolar nanofluid flow through a vertically rotating channel embedded in a resistive porous medium under the combined influence of magnetic, thermal, and electrical effects. The analysis also includes the use of fuzzy uncertainty modelling where the volume fraction of nanoparticles of 0%–3.5% is modelled using triangular fuzzy numbers, thus being able to give the realistic range of parameter variations as compared to other deterministic models. The combined effects of Hall current, Joule heating, and thermal radiation are systematically studied to explain their influence on the primary and secondary flows, microrotation, and thermal fields. A two-parameter homotopy analysis method (HAM) is employed to obtain highly accurate semi-analytical solutions and to effectively control convergence. Comparative evaluations between crisp and fuzzy solutions reveal notable sensitivity of the flow and heat transfer characteristics to uncertainty in nanoparticle concentration. Furthermore, analyses of skin friction coefficients and Nusselt numbers confirm the robustness and reliability of the proposed fuzzy-HAM approach in capturing uncertainty-driven magneto-thermal transport phenomena in micropolar nanofluids within porous rotating systems.</div></div>","PeriodicalId":51341,"journal":{"name":"Propulsion and Power Research","volume":"15 2","pages":"Pages 339-362"},"PeriodicalIF":6.7,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148559687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design optimisation factors for axial turbine stators in small-scale geo-solar powered Brayton applications","authors":"Ahmed M. Daabo,&nbsp;Ali Basem,&nbsp;Mudasar Zafar,&nbsp;Nabeel M. Abdulrazzaq,&nbsp;Fadhel N. Al-Mousawi,&nbsp;Omar Rafae Alomar,&nbsp;Qusay R. Al-Amir,&nbsp;Abdulelah H. Yaseen,&nbsp;Tawfik Badawy","doi":"10.1016/j.jppr.2026.06.002","DOIUrl":"10.1016/j.jppr.2026.06.002","url":null,"abstract":"<div><div>Small axial turbines for geo-solar Brayton cycles require stator designs that are efficient and robust, yet systematic guidance on how detailed stator airfoil geometry influences performance in this power range remains limited. This study quantifies the sensitivity of stator and stage performance to fourteen geometric parameters defining the stator airfoil and derives practical design guidance for small-scale geo-solar Brayton cycles in the 20–70 kW range. A reference axial turbine stage is first generated using mean-line design, followed by three-dimensional blade modelling and meshing using BladeGen and TurboGrid. Steady-state, three-dimensional compressible flow simulations are performed in ANSYS CFX employing the SST <em>k</em>-<em>ω</em> turbulence model. Each stator geometric parameter is varied individually within realistic bounds while all other parameters are held at baseline values. Stator losses, stator efficiency, and total-to-total stage efficiency are evaluated across a range of pressure ratios (<em>PR</em> = 2–4). Numerical accuracy is ensured through grid refinement, <em>y</em>-plus control, and comparison with independent experimental data from the literature. The results show a clear hierarchy of geometric influence. Four parameters, namely trailing edge wedge angle, trailing edge thickness, and two parameters governing the rear suction side contour, dominate performance, causing up to 5% variation in stator efficiency and about 2% variation in stage efficiency at higher pressure ratios. At <em>PR</em> = 3, the best configuration increased stator efficiency from 88.36% to 92.31% and total to total stage efficiency from 83.46% to 85.32%. Reducing the rear suction side parameter F13 from 50 to 20 mm increased stage efficiency from 82.70% to 85.76% at <em>PR</em> = 2 and reduced the nozzle loss coefficient from 0.757 to 0.377. Overall, most efficiency variation is governed by a small subset of geometric features, indicating that near optimal performance can be achieved with simplified stator geometries when these key parameters are selected carefully.</div></div>","PeriodicalId":51341,"journal":{"name":"Propulsion and Power Research","volume":"15 2","pages":"Pages 235-260"},"PeriodicalIF":6.7,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148559685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Computational analysis of MHD hybrid nanofluid flow between concentric cylinders in an annular region","authors":"Sowmya Govindaraju,&nbsp;Padmaja Venugopal,&nbsp;Sravan Kumar Thavada,&nbsp;Emad H. Aly,&nbsp;Suresh Babu Ramakrishna,&nbsp;Doaa M. Mostafa","doi":"10.1016/j.jppr.2026.04.001","DOIUrl":"10.1016/j.jppr.2026.04.001","url":null,"abstract":"<div><div>This study investigates the magnetohydrodynamic (MHD) characteristics of hybrid nanofluid flow confined between concentric cylindrical surfaces. The governing momentum and energy equations are formulated and solved subject to appropriate boundary conditions to analyze fluid motion and heat transport mechanisms. Particular attention is given to the roles of the Darcy number and magnetic field strength in regulating flow behavior and thermal performance. Comparative assessments demonstrate the reliability of the results and reveal that hybrid nanofluids provide enhanced thermal effectiveness in restricted geometries. An increase in the Darcy number lowers resistance within the porous medium, leading to higher fluid velocities and improved heat transfer, which is beneficial for geothermal and subsurface energy applications. Variations in the shape factor influence the flow by reducing velocity while promoting a more uniform temperature distribution, thereby contributing to greater thermal stability in control and regulation systems. Intensifying the internal heat generation elevates temperature gradients and induces fluid expansion, strengthening heat transfer in systems such as cooling devices and nuclear reactors. Furthermore, higher magnetic field intensity suppresses fluid motion due to Lorentz forces. The increased wall shear stress caused by inertial factors causes the skin friction coefficient increase along with the Reynolds number. The thinner thermal boundary layer causes the Nusselt number to escalation with the Reynolds number. These findings offer valuable insights for the design and optimization of advanced thermal management systems, energy technologies, and industrial applications.</div></div>","PeriodicalId":51341,"journal":{"name":"Propulsion and Power Research","volume":"15 2","pages":"Pages 300-310"},"PeriodicalIF":6.7,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148559684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}