Abstract

This article presents the study of a ventilation solution using cross-flow fans for the crew quarters (CQ) aboard the International Space Station. Currently the CQ uses two axial fans for ventilation, which occasionally generate insufficient flow rate or acoustic issues. A ventilation circuit using two cross-flow fans was designed, its acoustic performance was measured and the flow was investigated via CFD by using the measured cross-flow fan operating curves as boundary conditions. The acoustic performance of the fans was evaluated in isothermal conditions, under the assumption that the heat generated by the occupants and equipment would produce negligible thermal buoyancy effects in microgravity on the station. Future studies will investigate how the internal heat generated in the enclosure affects the thermal comfort conditions of the occupants. After a comparison between the axial and cross-flow fan systems, results indicate that the latter provides better acoustic parameters for the same flow rate with less energy consumption.

摘要

本文介绍了对国际空间站乘员舱 (CQ) 使用横流风扇的通风解决方案的研究。目前 CQ 使用两个轴流风扇进行通风，偶尔会产生流量不足或噪音问题。设计了一个使用两个横流风扇的通风回路，测量了它的声学性能，并使用测量的横流风扇运行曲线作为边界条件，通过 CFD 研究了流动。风扇的声学性能是在等温条件下评估的，假设乘客和设备产生的热量在空间站的微重力条件下产生的热浮力效应可以忽略不计。未来的研究将调查外壳中产生的内部热量如何影响居住者的热舒适条件。