水动力学研究与进展:英文版最新文献_第2页

ICHD' 2018 The 13th International Conference on Hydrodynamics First Announcement ICHD' 2018第十三届国际流体力学会议首次公告

3区工程技术

水动力学研究与进展:英文版 Pub Date : 2017-12-01 DOI: 10.1016/S1001-6058(17)30011-2

引用次数: 0

Numerical investigation of unsteady sheet/cloud cavitation over a hydrofoil in thermo-sensitive fluid 热敏流体中水翼非定常片云空化的数值研究

3区工程技术

水动力学研究与进展:英文版 Pub Date : 2017-12-01 DOI: 10.1016/S1001-6058(16)60813-2

Tie-zhi Sun (孙铁志) , Zhi Zong (宗智) , Li Zou (邹丽) , Ying-jie Wei (魏英杰) , Yi-chen Jiang (姜宜辰)

{"title":"Numerical investigation of unsteady sheet/cloud cavitation over a hydrofoil in thermo-sensitive fluid","authors":"Tie-zhi Sun (孙铁志) , Zhi Zong (宗智) , Li Zou (邹丽) , Ying-jie Wei (魏英杰) , Yi-chen Jiang (姜宜辰)","doi":"10.1016/S1001-6058(16)60813-2","DOIUrl":"10.1016/S1001-6058(16)60813-2","url":null,"abstract":"<div><p>The sheet/cloud cavitation is of a great practical interest since the highly unsteady feature involves significant fluctuations around the body where the cavitation occurs. Moreover, the cavitating flows are complicated due to the thermal effects. The present paper numerically studies the unsteady cavitating flows around a NACA0015 hydrofoil in the fluoreketone and the liquid nitrogen with particular emphasis on the thermal effects and the dynamic evolution. The numerical results and the experimental measurements are generally in agreement. It is shown that the temperature distributions are closely related to the cavity evolution. Meanwhile, the temperature drop is more evident in the liquid nitrogen for the same cavitation number, and the thermal effect suppresses the occurrence and the development of the cavitating flow, especially at a low temperature in the fluoroketone. Furthermore, the cavitating flows are closely related to the complicated vortex structures. The distributions of the pressure around the hydrofoil is a major factor of triggering the unsteady sheet/cloud cavitation. At last, it is interesting to find that one sees a significant thermal effect on the cavitation transition, a small value of σ/2α is required in the thermo-sensitive fluids to achieve the similar cavitation transition that occurs in the water.</p></div>","PeriodicalId":66131,"journal":{"name":"水动力学研究与进展:英文版","volume":"29 6","pages":"Pages 987-999"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1001-6058(16)60813-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4014121","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: 16

Compressible effect on the cavitating flow: A numeric study 可压缩对空化流动的影响:数值研究

3区工程技术

水动力学研究与进展:英文版 Pub Date : 2017-12-01 DOI: 10.1016/S1001-6058(16)60823-5

Wei Zhang (张伟) , Xiao-dong Bai (柏晓东) , Zheng Ma (马峥) , Gang Chen (陈刚) , Yong Wang

引用次数: 8

Water medium retarders for heavy-duty vehicles: Computational fluid dynamics and experimental analysis of filling ratio control method 重型车辆水介质缓速器:充装比控制方法的计算流体力学与实验分析

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水动力学研究与进展:英文版 Pub Date : 2017-12-01 DOI: 10.1016/S1001-6058(16)60820-X

Hong-peng Zheng (郑宏鹏), Yu-long Lei (雷雨龙), Peng-xiang Song (宋鹏翔)

引用次数: 7

Experimental measurement of tip vortex flow field with/without cavitation in an elliptic hydrofoil 椭圆型水翼有/无空化时叶顶涡流场的实验测量

3区工程技术

水动力学研究与进展:英文版 Pub Date : 2017-12-01 DOI: 10.1016/S1001-6058(16)60808-9

Xiao-xing Peng (彭晓星), Liang-hao Xu (徐良浩), Yu-wen Liu (刘玉文), Guo-ping Zhang (张国平), Yan-tao Cao (曹彦涛), Fang-wen Hong (洪方文), Kai Yan (颜开)

{"title":"Experimental measurement of tip vortex flow field with/without cavitation in an elliptic hydrofoil","authors":"Xiao-xing Peng (彭晓星), Liang-hao Xu (徐良浩), Yu-wen Liu (刘玉文), Guo-ping Zhang (张国平), Yan-tao Cao (曹彦涛), Fang-wen Hong (洪方文), Kai Yan (颜开)","doi":"10.1016/S1001-6058(16)60808-9","DOIUrl":"10.1016/S1001-6058(16)60808-9","url":null,"abstract":"<div><p>In this paper, recent measurements of tip vortex flow with and without cavitation carried out in Cavitation Mechanism Tunnel of China Ship Scientific Research Center (CSSRC) are presented. The elliptic hydrofoil with section NACA 66<sub>2</sub>-415 was adopted as test model. High-speed video (HSV) camera was used to visualize the trajectory of tip vortex core and the form of tip vortex cavitation (TVC) in different cavitation situations. Laser Doppler velocimetry (LDV) was employed to measure the tip vortex flow field in some typical sections along the vortex trajectory with the case of cavitation free. Stereo particle image velocimetry (SPIV) system was used to measure the velocity and vorticity distributions with and without cavitation. Series measurement results such as velocity and vorticity distributions, the trajectory of tip vortex core, the vortex core radius, cavity size and cavitation inception number were obtained. The results demonstrated that the minimum pressure coefficient in the vortex core obtained by flow field measurement was quite coincident with the tip vortex cavitation inception number obtained under the condition of high incoming velocity and low air content. And TVC would decrease the vortex strength comparing with the case without cavitation.</p></div>","PeriodicalId":66131,"journal":{"name":"水动力学研究与进展:英文版","volume":"29 6","pages":"Pages 939-953"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1001-6058(16)60808-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4014606","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: 31

Bubbly shock propagation as a mechanism of shedding in separated cavitating flows 气泡激波传播作为分离空化流的脱落机制

3区工程技术

水动力学研究与进展:英文版 Pub Date : 2017-12-01 DOI: 10.1016/S1001-6058(16)60805-3

Harish Ganesh , Simo A. Mäkiharju , Steven L. Ceccio

引用次数: 23

Novel scaling law for estimating propeller tip vortex cavitation noise from model experiment 基于模型试验的螺旋桨尖涡空化噪声估计的新标度律

3区工程技术

水动力学研究与进展:英文版 Pub Date : 2017-12-01 DOI: 10.1016/S1001-6058(16)60810-7

Jisoo Park, Woojae Seong

{"title":"Novel scaling law for estimating propeller tip vortex cavitation noise from model experiment","authors":"Jisoo Park, Woojae Seong","doi":"10.1016/S1001-6058(16)60810-7","DOIUrl":"10.1016/S1001-6058(16)60810-7","url":null,"abstract":"<div><p>The tip vortex cavitation (TVC) noise of marine propellers is of interest due to the environmental impacts from commercial ships as well as for the survivability of naval ships. Due to complicated flow and noise field around a marine propeller, a theoretical approach to the estimation of TVC noise is practically unrealizable. Thus, estimation of prototype TVC noise level is realized through extrapolation of the model TVC noise level measured in a cavitation tunnel. In this study, for the prediction of prototype TVC noise level from a model test, a novel scaling law reflecting the physical basis of TVC is derived from the Rayleigh-Plesset equation, the Rankine vortex model, the lifting surface theory, and other physical assumptions. Model and prototype noise data were provided by Samsung Heavy Industries (SHI) for verification. In applying the novel scaling law, similitude of the spectra of nuclei is applied to assume the same nuclei distribution in the tip vortex line of the model and the prototype. It was found that the prototype TVC noise level predicted by the novel scaling law has better agreement with the prototype TVC noise measurement than the prototype TVC noise level predicted by the modified ITTC noise estimation rule.</p></div>","PeriodicalId":66131,"journal":{"name":"水动力学研究与进展:英文版","volume":"29 6","pages":"Pages 962-971"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1001-6058(16)60810-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4014118","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: 19

The effect of free surface on cloud cavitating flow around a blunt body 钝体周围自由表面对云空化流动的影响

3区工程技术

水动力学研究与进展:英文版 Pub Date : 2017-12-01 DOI: 10.1016/S1001-6058(16)60812-0

Chang Xu (徐畅) , Yi-wei Wang (王一伟) , Chen-guang Huang (黄晨光) , Jian Huang (黄荐) , Chao Yu (余超)

{"title":"The effect of free surface on cloud cavitating flow around a blunt body","authors":"Chang Xu (徐畅) , Yi-wei Wang (王一伟) , Chen-guang Huang (黄晨光) , Jian Huang (黄荐) , Chao Yu (余超)","doi":"10.1016/S1001-6058(16)60812-0","DOIUrl":"10.1016/S1001-6058(16)60812-0","url":null,"abstract":"<div><p>In this study, the effect of the free surface on the cloud cavitating flow around a blunt body is investigated based on the water tank experiment and the CFD method. Numerical results are in good agreement with experimental data, and the mesh independence of the methods is verified. The cavity evolution process includes the cavity growth, the re-entrant jet, the cavity shedding, and the collapse, which can all be observed from the water tank experiment. The effects of the free surface on the cavity length, the thickness, and the cavity evolution period are analyzed by comparing the difference between the cavitating flows on the upper and lower sides of the body. This study also examines the effect of the distance between the free surface and the model through a series of water tank experiments and numerical simulations. The cavity stability and asymmetry, as well as the thickness and the velocity of the re-entrant jet inside the cavity, which varies with the submerged depth, are discussed with consideration of the effect of the free surface. The effect of the free surface on the cavitating flow around the blunt body is enhanced with the decrease of the submerged depth.</p></div>","PeriodicalId":66131,"journal":{"name":"水动力学研究与进展:英文版","volume":"29 6","pages":"Pages 979-986"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1001-6058(16)60812-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3997012","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: 15

Numerical simulation of a two-dimensional flapping wing in advanced mode 二维扑翼先进模态的数值模拟

3区工程技术

水动力学研究与进展:英文版 Pub Date : 2017-12-01 DOI: 10.1016/S1001-6058(16)60801-6

Zhi-yong Liang (梁志勇) , Liang Wei (魏亮) , Jing-yu Lu (卢锦煜) , Xiao-hong Qin (覃小红)

引用次数: 2

A numerical study of tadpole swimming in the wake of a D-section cylinder 蝌蚪在d形圆柱体尾迹中游动的数值研究

3区工程技术

水动力学研究与进展:英文版 Pub Date : 2017-12-01 DOI: 10.1016/S1001-6058(16)60818-1

Hao-tian Yuan (袁昊天), Wen-rong Hu (胡文蓉)

{"title":"A numerical study of tadpole swimming in the wake of a D-section cylinder","authors":"Hao-tian Yuan (袁昊天), Wen-rong Hu (胡文蓉)","doi":"10.1016/S1001-6058(16)60818-1","DOIUrl":"10.1016/S1001-6058(16)60818-1","url":null,"abstract":"<div><p>The vortex structure and the hydrodynamic performance of a tadpole undulating in the wake of a D-section cylinder are studied by solving the Navier-Stokes equations for the unsteady incompressible viscous flow. A dynamic mesh fitting the tadpole's deforming body surface is used in the simulation. It is found that three main factors can contribute to the thrust of the tadpole behind a D-cylinder: the backward jet in the wake, the local reverse flows on the tadpole surface and the suction force caused by the passing vortices. The tadpole's relative undulating frequency and the distance between the D-cylinder and the tadpole have a great influence on both the vortex structure and the hydrodynamic performance. At some undulating frequency, a tadpole may break or dodge vortices from the D-cylinder. When the vortices are broken, the tadpole can gain a great thrust but will consume much energy to maintain its undulation. When the vortices are dodged, the tadpole is subject to a small thrust or even a drag. However, it is an effective way to save much energy in the undulating swimming, as the Kármán gait does. As the tadpole is located behind the D-cylinder at different distances, three typical kinds of wake are observed. When an incomplete Kármán vortex street forms between the D-cylinder and the tadpole, the tadpole is subject to the highest thrust.</p></div>","PeriodicalId":66131,"journal":{"name":"水动力学研究与进展:英文版","volume":"29 6","pages":"Pages 1044-1053"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1001-6058(16)60818-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4014567","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: 9