Distribution law analysis and calculating method for windage power in a geotechnical centrifuge  

作　　者：Chuanxiang ZHENG Yuchen DAI Jiao LIN Jianqun JIANG Jinjie LU Zhenyu WANG Jiaming YAN 

机构地区：[1]College of Energy Engineering,Zhejiang University,Hangzhou 310027,China [2]Huadong Engineering Co.Ltd.,Hangzhou 300450,China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2024年第11期938-952,共15页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：supported by the National Major Science and Technology Infrastructure Project of China(No.2017-000052-73-01-002083);the Information Technology Center,Zhejiang University,China.

摘　　要：Temperature rise caused by windage power is a major limitation to the large-scale process of geotechnical centrifuges.However,there is no consensus on how to identify the key parts(parts with high windage power consumption)and parameters(the velocity coefficientαand windage coefficient C_(i)),and the influence of idle power is often neglected in methods for calculating windage power.To address these issues,a Centrifugal Hypergravity and Interdisciplinary Experiment Facility(CHIEF)scaled model device was constructed,and the windage power was measured.Then,a computational fluid dynamics(CFD)model of the device was established and validated by experimental results.Simulation results were analyzed to quantify the proportion of the windage power in different parts of the device and summarize the variation law of key parameters.Finally,a novel windage power calculation equation was developed based on the elimination of the influence of the idle power.Results show that the role of the rotating arm cannot be ignored in the selection of key parts.The velocity coefficient and windage coefficient are a function of the device geometry and size,and are independent of the angular velocity.The windage power is proportional to the cube of the angular velocity after eliminating the effect of idle power.

关 键 词：Geotechnical centrifuge Windage power Key parts and parameters Centrifugal Hypergravity and Interdisciplinary Experiment Facility(CHIEF) Idle power 

分 类 号：TU415[建筑科学—岩土工程]