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International Journal of Fluid Machinery and Systems最新文献

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Study on the Effect of Gas-Liquid Two-Phase Medium on PAT Performance 气液两相介质对PAT性能影响的研究
International Journal of Fluid Machinery and Systems Pub Date : 2021-01-01 DOI: 10.5293/IJFMS.2021.14.3.247
Shi Feng-xia, Yang Junhu, Wang Xiaohui, Miao Sen-chun, Guo Rui
{"title":"Study on the Effect of Gas-Liquid Two-Phase Medium on PAT Performance","authors":"Shi Feng-xia, Yang Junhu, Wang Xiaohui, Miao Sen-chun, Guo Rui","doi":"10.5293/IJFMS.2021.14.3.247","DOIUrl":"https://doi.org/10.5293/IJFMS.2021.14.3.247","url":null,"abstract":"","PeriodicalId":38576,"journal":{"name":"International Journal of Fluid Machinery and Systems","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71121906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study on the Influence of the Main Parameters of Pellets Distribution and Settlement in the Passage of Shot Blasting 抛丸过程中主要参数对球团分布及沉降的影响研究
International Journal of Fluid Machinery and Systems Pub Date : 2020-12-31 DOI: 10.5293/IJFMS.2020.13.4.767
Yanghou Chen, Yangbo Chen
{"title":"Study on the Influence of the Main Parameters of Pellets Distribution and Settlement in the Passage of Shot Blasting","authors":"Yanghou Chen, Yangbo Chen","doi":"10.5293/IJFMS.2020.13.4.767","DOIUrl":"https://doi.org/10.5293/IJFMS.2020.13.4.767","url":null,"abstract":"The simulation of separation and settlement under two kinds of flue gas channels in the new dust removal method of shot peening is studied. By using FLUENT software and orthogonal experiment method of four factors and three levels, the influence of different velocity, pellet density, pellet size and velocity difference on the settlement rate of primary settlement channel is analyzed. The results show that the layout of flue gas channel has a significant impact on the mechanical settlement mode, which is mainly reflected in the impact of the density on the shot, and the shot density is the leading factor in several factors studied. Under the same flue structure, when the material density of the pellets is increased, the sedimentation rate of pellets can be increased, so the pellets are easier to be removed. In the process of free settlement, when the velocity of flue gas is increased, the migration path of pellets carried by flue gas increases, which is unfavorable to the removal of pellets. Therefore, the high density and inertia separation method is preferred in dust removal of shot blasting.","PeriodicalId":38576,"journal":{"name":"International Journal of Fluid Machinery and Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42327413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study on Improving Cavitation Performance of Centrifugal Pump by Perforation at the Front Cover Plate 前盖板穿孔改善离心泵空化性能的研究
International Journal of Fluid Machinery and Systems Pub Date : 2020-12-31 DOI: 10.5293//IJFMS.2020.13.4.668
W. Dongwei, Liu Zailun, Han Wei
{"title":"Study on Improving Cavitation Performance of Centrifugal Pump by Perforation at the Front Cover Plate","authors":"W. Dongwei, Liu Zailun, Han Wei","doi":"10.5293//IJFMS.2020.13.4.668","DOIUrl":"https://doi.org/10.5293//IJFMS.2020.13.4.668","url":null,"abstract":"","PeriodicalId":38576,"journal":{"name":"International Journal of Fluid Machinery and Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42482885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Effect of Discharge Elbow on Performance of the Axial Flow Pump in Saddle Zone 流量弯头对鞍区轴流泵性能的影响
International Journal of Fluid Machinery and Systems Pub Date : 2020-12-31 DOI: 10.5293/IJFMS.2020.13.4.775
Xianfang Wu, Heyu Ye, M. Tan, Hou-lin Liu
{"title":"Effect of Discharge Elbow on Performance of the Axial Flow Pump in Saddle Zone","authors":"Xianfang Wu, Heyu Ye, M. Tan, Hou-lin Liu","doi":"10.5293/IJFMS.2020.13.4.775","DOIUrl":"https://doi.org/10.5293/IJFMS.2020.13.4.775","url":null,"abstract":"The discharge elbow is an important part for the axial flow pump system, and the saddle area on the performance curve is a special characteristic of the axial flow pump. In order to reveal the influence of discharge elbow on the saddle zone, the saddle zone performance of an axial flow pump with two different discharge elbows (90° and 60°) is described in this paper by simulation and test. First, the effect of discharge elbows on pump energy performance is analyzed. The results indicate that the saddle zone of model pump with different discharge elbows is always between 0.5QBEP and 0.6QBEP (QBEP represents flow rate at the best efficient point), and the head value reaches the minimum at 0.55QBEP. Then, the analysis on pressure pulsation of different models is shown. The results show that compared to 90° discharge elbow model, the peak to peak value of pressure pulsation of 60° discharge elbow model at impeller inlet and pump outlet all reduces significantly under each flow rate. When the discharge elbow is 90°, the main frequency of the pressure pulsation at impeller inlet and pump outlet is the blade passing frequency fp, and many low-frequency pulsation components appear in saddle zone. When the discharge elbow is 60°, the main frequency of pressure pulsation at pump outlet changes from the blade passing frequency fp to the axial passing frequency fn. Finally, a focus by the numerical simulation about the internal characteristics is given. It is found that a small amount of vortex occurs in these two discharge elbows at saddle zone condition while the high speed area appears in pump outlet extend. After the 90° discharge elbow is replaced by 60° discharge elbow, the streamline distribution becomes more uniform and the hydraulic loss caused by the vortex decreases.","PeriodicalId":38576,"journal":{"name":"International Journal of Fluid Machinery and Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47135034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Effect of Weir Configurations on the Performance of Oil-Water Separator 堰型对油水分离器性能的影响
International Journal of Fluid Machinery and Systems Pub Date : 2020-12-31 DOI: 10.5293/IJFMS.2020.13.4.759
K. J. Jung, Youn-J. Kim
{"title":"Effect of Weir Configurations on the Performance of Oil-Water Separator","authors":"K. J. Jung, Youn-J. Kim","doi":"10.5293/IJFMS.2020.13.4.759","DOIUrl":"https://doi.org/10.5293/IJFMS.2020.13.4.759","url":null,"abstract":"The horizontal oil-water separator is a device for separating water and oil through a gravity sedimentation system. In this separator, the weir is located in the apparatus between the water outlet and the oil outlet, and ultimately separates the oil from the water. Depending on the angle and height of the weir, the width of the multi-phase interface might be changed within a certain range. This study compares the separation efficiency according to the inclined angle of the weir and various inlet flow conditions through numerical analysis. The target model is a modularized FWKO (free water knock out) vessel in an oil sands plant. In the present research, the area of the oil-water interface is widened and the separation efficiency is increased for a weir leaning in the direction of the oil outlet. Furthermore, limits of separation efficiency for SOR(steam-oil ratio) value and residence time of mixture were analyzed. In conclusion, the gravitational sedimentation method can improve to about 90% without additional devices. However, the fatigue stress caused by inclining the weir have to be considered for improved stability.","PeriodicalId":38576,"journal":{"name":"International Journal of Fluid Machinery and Systems","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41325655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Numerical Study on Surge Degeneration (Stall Stagnation) and Recovery therefrom in Axial Flow Compressors 轴流压气机喘振退化(失速停滞)及其恢复的数值研究
International Journal of Fluid Machinery and Systems Pub Date : 2020-12-31 DOI: 10.5293/IJFMS.2020.13.4.718
N. Yamaguchi
{"title":"A Numerical Study on Surge Degeneration (Stall Stagnation) and Recovery therefrom in Axial Flow Compressors","authors":"N. Yamaguchi","doi":"10.5293/IJFMS.2020.13.4.718","DOIUrl":"https://doi.org/10.5293/IJFMS.2020.13.4.718","url":null,"abstract":"Phenomena of surge degenerations and recoveries therefrom, which are related with so-called stall stagnation problems, are studied on the basis of numerical-experimental results by one-dimensional surge simulations on a singlestage axial flow compressor and a five-stage one. The phenomena are observed to show some different tendencies depending on the number of stages and the relative location of the compressor in the flowpath. The mass flow amplitudes, as the measure of the surge sizes, show behaviors of either continuous decrease in the amplitudes or discontinuous ones in the degeneration process. The latter is seen in the five-stage compressor and the former in the single-stage one. The difference in the tendency appears to be influenced by the levels of the compressor pressure-ratios and by the relative compressor locations also. Recoveries from seriously degenerated surge situations are observed to be achieved by opening the exit valve widely. It suggests that the stall margins available for alleviating significantly the pressure loads are indispensable in the situation. In the sense, it could be said that the stall stagnation or non-recoverable stall is the phenomenon related intimately with the surge degeneration tendency in the compressor-flowpath system characteristics, deteriorated furthermore by operational factors on-site, such as insufficient stall margins and limited flexibilities of operational procedures.","PeriodicalId":38576,"journal":{"name":"International Journal of Fluid Machinery and Systems","volume":"13 1","pages":"718-736"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45230738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Through-flow Analysis Method of Axial Fan with BPF and Broadband Noise Models 基于BPF和宽带噪声模型的轴流风机通流分析方法
International Journal of Fluid Machinery and Systems Pub Date : 2020-12-31 DOI: 10.5293/IJFMS.2020.13.4.737
Chan Lee, H. Kil
{"title":"A Through-flow Analysis Method of Axial Fan with BPF and Broadband Noise Models","authors":"Chan Lee, H. Kil","doi":"10.5293/IJFMS.2020.13.4.737","DOIUrl":"https://doi.org/10.5293/IJFMS.2020.13.4.737","url":null,"abstract":"The present paper proposes and describes a through-flow analysis method of axial fan coupled with BPF and broadband noise prediction models. The flow and performance predictions of axial fan are made by streamline curvature method with empirical correlations for flow deviation and pressure losses. After the computation of streamline curvature method, the predicted flow velocity, flow angle and wake thickness distributions along fan blade span are used for calculating the acoustic pressures produced from BPF and broadband noise sources. The present method is applied to several automotive and air-conditioning fans for verifying its prediction accuracy. The fan flow, performance and noise prediction results by the present method are compared with the CFD and the measurement results. From the comparison results, the present method is shown to provide favorable prediction results within a few percent relative errors and can be used as a reliable design tool of high efficiency and low noise fan at the actual fan design practice.","PeriodicalId":38576,"journal":{"name":"International Journal of Fluid Machinery and Systems","volume":"13 1","pages":"737-742"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48422152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Review: Gravitational Vortex Turbines as a Renewable Energy 综述：引力涡轮机作为一种可再生能源
International Journal of Fluid Machinery and Systems Pub Date : 2020-12-31 DOI: 10.5293/IJFMS.2020.13.4.704
Jorge Sierra, Alejandro Ruiz, Angie Guevara, A. Posada
{"title":"Review: Gravitational Vortex Turbines as a Renewable Energy","authors":"Jorge Sierra, Alejandro Ruiz, Angie Guevara, A. Posada","doi":"10.5293/IJFMS.2020.13.4.704","DOIUrl":"https://doi.org/10.5293/IJFMS.2020.13.4.704","url":null,"abstract":"As result of the negative environmental impact of large hydroelectric dams and conventional diesel power plants, new renewable energy sources should be studied. Gravitational Vortex Turbines (GVTs) can provide clean energy to offgrid areas, known as Non-Interconnected Zones in Colombia, by inducing a water vortex in a turbine-generator set. The implementation of these turbines in the world has expanded due to demographic growth in remote areas, and new studies have enhanced their efficiency. However, there is not enough literature about the estimation of the incidence of their geometric and operating parameters on their performance. This paper presents a global overview of GVTs through a literature review that explores their operation as well as numerical, experimental, and analytical studies that have been conducted to improve their efficiency.","PeriodicalId":38576,"journal":{"name":"International Journal of Fluid Machinery and Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46873389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Influence of Number of Blades on Performance and Internal Flow of High Head Contra-Rotating Small Hydroturbine 叶片数量对高水头对转小型水轮机性能和内部流量的影响
International Journal of Fluid Machinery and Systems Pub Date : 2020-12-31 DOI: 10.5293/IJFMS.2020.13.4.786
Takuji Hosotani, T. Shigemitsu, Y. Kawaguchi, Takuya Inamoto, Takeru Ishiguro, D. Nan
{"title":"Influence of Number of Blades on Performance and Internal Flow of High Head Contra-Rotating Small Hydroturbine","authors":"Takuji Hosotani, T. Shigemitsu, Y. Kawaguchi, Takuya Inamoto, Takeru Ishiguro, D. Nan","doi":"10.5293/IJFMS.2020.13.4.786","DOIUrl":"https://doi.org/10.5293/IJFMS.2020.13.4.786","url":null,"abstract":"","PeriodicalId":38576,"journal":{"name":"International Journal of Fluid Machinery and Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46068755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Numerical Investigation of Suction Performance of Inducer with Splitter Blade 带分流叶片的诱导轮吸力特性的数值研究
International Journal of Fluid Machinery and Systems Pub Date : 2020-10-01 DOI: 10.5293/IJFMS.2020.13.4.750
Yohei Tanaka, S. Watanabe, S. Ohashi, Y. Matsunaga
{"title":"Numerical Investigation of Suction Performance of Inducer with Splitter Blade","authors":"Yohei Tanaka, S. Watanabe, S. Ohashi, Y. Matsunaga","doi":"10.5293/IJFMS.2020.13.4.750","DOIUrl":"https://doi.org/10.5293/IJFMS.2020.13.4.750","url":null,"abstract":"For general-use turbopump inducers, high suction performance is required in a wide operating range including the cutoff point. At the low flow rates, low frequency cavitation surge is known to occur with the strong inlet backflow from the inducer. The reduced inlet blade angle would be favoured for the suppression of this inlet backflow, whereas the reduced inlet blade angle causes the deterioration of suction performance through the reduced inlet throat area. In this study, a splitter blade was adopted for the helical inducer to overcome or relieve these two conflicting problems, and the effectiveness was investigated by CFD considering cavitation. First, the favourable length and the circumferential position of short blade were investigated by 2-D cascade model. Then, the obtained suitable cascade design was applied for the 3D helical inducer. As a result, the inlet backflow was found to be weakened at the low flow rates as expected, while keeping the good suction performance of inducer in the whole flow rate range.","PeriodicalId":38576,"journal":{"name":"International Journal of Fluid Machinery and Systems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49426945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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