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| Temperature control test of scaled model of high capacity hypergravity centrifuge |
Wei-an LIN( ),Chuan-xiang ZHENG*(),Jian-qun JIANG,Dao-sheng LING,Yun-min CHEN |
| Research Center of Hypergravity, MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China |
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Abstract The temperature rise in the main engine room caused by the wind resistance power is high when the acceleration of the high gravity centrifuge reaches more than 1000g. The corresponding temperature control strategy was proposed through the study of the heat generation mechanism and heat dissipation mechanism of the high gravity centrifuge. In order to solve the above problem, a 1∶20 scaled test was carried out on a large capacity geocentrifuge with an acceleration of 1500g. The principle of the same friction heat generation caused by the same air velocity flowing through the side wall was used for the simulation test, that is, the linear velocity at the outermost end of the high-speed rotor was the same as 290 m/s, and the wind resistance power test and the temperature control methods study were conducted in this speed. The influence of the vacuum degree, the temperature of the side wall cooler and the volume flow of the coolant in the side wall cooler on the temperature of the main engine room was summarized. Thus, a temperature control scheme of centrifugal hypergravity and interdisciplinary experiment facility (CHIEF) was proposed. The test results from the scale model can provide a design reference for the design of the prototype.
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Received: 14 January 2020
Published: 28 August 2020
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Corresponding Authors:
Chuan-xiang ZHENG
E-mail: inweian@zju.edu.cn;zhchx@zju.edu.cn
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大容量超重力离心机温控缩比模型试验
为了解决超重力离心机在加速度大于1000g时由于风阻功率引起的主机室温升超高的问题，通过对超重力离心机产热机理及散热机理的研究，提出对应的温度控制策略. 对超重力加速度为1500g的大容量土工离心机进行1∶20缩比，基于以相同空气流速流过侧壁引起的摩擦产热相同的原理进行模拟试验，即在高速转子最外端线速度同为290 m/s下进行风阻功率测试及温度调控试验研究. 总结缩比离心试验机机室内的真空度、侧壁冷却器温度、侧壁冷却器内冷却液体积流量等对主机室温度的影响规律，得到最佳温控调节方案，提出超重力离心模拟与试验装置（CHIEF）离心机室温控方案. 缩比模拟试验结果可为原型机的设计提供设计参考.
关键词：
超重力离心机,
风阻功率,
产热,
散热,
真空,
液冷
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