摘要
针对喷水推进中,不同进水流道管径和不同转速对进水流道流场及速度产生影响的问题,建立了三维模型,采用计算流体力学(CFD)技术,分别对某喷水推进器进水流道长度的1倍、4倍、8倍和管径的1倍、1.6倍、2倍,以“船+进水流道+喷水推进器”的流场进行了仿真计算分析,得到不同参数下该喷水推进器进水流道出口流场的不均匀度速度云图、叶片吸力面汽蚀云图及喷口速度云图。研究结果表明:进水流道长度对出口流场的不均匀度、叶片的汽蚀、喷口速度影响较小,但进水流道管径对出口流场的不均匀度、叶片的汽蚀、喷口速度影响较大;进水流道的优化改进应适当考虑进水流道管径,以提高其工况适应能力。
Aiming at the problem of how the waterjet propulsor affects the flow fields and velocities of the inlet ducts with different lengths and pipe diameters,the 3D models of the waterjet propulsors were established.The computational fluid mechanics(CFD)technology was used to simulate the flow fields of"boat+inlet channel+waterjet propulsor"with 1 time,4times,8times of the lengths and 1.6times,2times of the diameters repectively.Then the velocity nephograms of non-uniformity of the outlet flow field in the inlet duct,the cavitation nephograms of the blade suction surface and the velocity nephograms of the nozzle were obtained.The results indicate that the non-uniformity of the outlet flow field,blade cavitation and nozzle velocity is affected little by the length of the inlet duct.However,it is affected more by the diameters of the inlet duct.To improve the adaptability of the inlet duct in working conditions,its diameter should be taken into consideration for its optimization.
作者
杨福芹
王学志
姜敬伟
何燕
YANG Fu-qin;WANG Xue-zhi;JIANG Jing-wei;HE Yan(College of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao 266061,China)
出处
《机电工程》
CAS
北大核心
2019年第11期1212-1215,共4页
Journal of Mechanical & Electrical Engineering
基金
山东省重点研发计划项目(2018GGX103015)
关键词
喷水推进器
进水流道
不均匀度
汽蚀
喷口速度
计算流体力学
the waterjet propulsor
inlet duct
unevenness
cavitation
spout speed
computational fluid mechanics(CFD)
