民用飞机废水系统非定常三相流动特性研究

废水系统属于民用飞机机载系统的重要组成部分，污水排放的有效性直接关系到乘客的乘坐舒适性与健康。因此，有必要对民用飞机废水系统中的气液固三相流动进行研究。采用欧拉方法模拟废水管路的气液固三相流动，对飞行高度、马桶工作状态因素对废水排放的影响进行分析。结果表明：仅最远端马桶工作时，随着飞行高度的增加，废水流动的核心峰值时间...

Researches on Unsteady Three-Phase Flow Characteristics of Water/Wastewater System of Civil Aircraft

The wastewater system is an important aircraft part of civil aircraft. The effective sewage discharge is closely related to the ride comfort and health of passengers. In this work, Euler method was used to simulate the gas-liquid solid three-phase flow in wastewater system, and the effect of flight height and working condition of toilet on wastewater emission has been analyzed. Results show that: when only the farthest toilet works, with the increase of flight altitude, the core peak time of waste water flow is brought forward, and the time required for waste water to be completely discharged are significantly shortened from 3.31s to 1.87s, and the waste water can be quickly discharged into the waste water tank. When the three toilets work at the same time, the negative pressure in the waste water pipeline will be reduced, and the flow rate of different cross sections will decrease by 66.5% on average, the toilet close to the waste water tank will reduce the discharge efficiency of the farthest toilet, resulting in the waste water cannot be discharged quickly. When the flushing time of toilet close to wastewater tank is adjusted to 2s, and the farthest toilet needs to be opened separately, the wastewater in the farthest toilet can be fully discharged into the wastewater tank.