基于响应面分析的结构参数对蒸汽喷射泵性能的影响  

Influence of Structure on Properties of Steam-Jet Pump:A Simulation and Analytical Study

作　　者：苗苗 邵延君[1] 王俊元[1] 许向川 Miao Miao, Shao Yanjun, Wang Junyuan, Xu Xiangchuan(School of Mechanical Engineering, North University of China, Taiynan 030051, Chin)

机构地区：[1]中北大学机械工程学院,太原030051

出　　处：《真空科学与技术学报》2018年第3期176-180,共5页Chinese Journal of Vacuum Science and Technology

基　　金：山西省自然科学基金项目(201701D121079)

摘　　要：为了更准确地优化蒸汽喷射泵的结构参数,提高喷射泵的性能,选取A(喉径比)、B(扩散器锥度)、C(喉管长度与直径的比值)、D(喷嘴距)为优化变量,R(引射系数)为目标响应,将数值模拟法与响应面法相结合,建立了能够较好反映各优化变量对引射系数的响应回归模型。通过方差分析和分析建立的响应面3D图,得出:喉径比、扩散器锥度以及喷嘴距对喷射泵性能有显著影响,且喉径比与扩散器锥度都与喷嘴距有较显著的交互作用,借助Design Expert软件优化后得到在考虑这些交互作用下的最优结构参数组合为:A=0.11,B=8.75°,C=3,D=36 mm。研究结果为准确的选取蒸汽喷射泵的结构参数,提高喷射泵的性能提供了新方法。The impact of the four major structural variables, including the throat diameter ratio, diffuser angle, throat length to diameter ratioand nozzle pitch, on the ejector coefficient of the steam-jet pump was mathematically formulated with regression model, theoretically analyzed inresponse surface method, numerically simulated with soft- ware Fluent and experimentally evaluated for design optimization. The results show that the structure significantly af- fects the ejector coefficient. For example, as the nozzle pitch decreases from 40 to 36 mm, the largest enhancement of the ejector coefficient decreases from 40% to 36%. The structure of the steam-jet pump,optimized with Design Ex- pert software, comprises a throat diameter ratio of 0.11, a diffuser angle of 8.75°, a throat length to diameter ratio of 3 and a nozzle pitch of 36 mm. We suggest that the simulated and calculated results be of some technological interest in design optimization of steam-jet pumps.

关 键 词：蒸汽喷射泵 结构参数 引射系数 响应面法 

分 类 号：TH38[机械工程—机械制造及自动化]