载人航天器生活舱内湿度场的稳态数值模拟

研究载人航天器生活舱内部的湿度情况具有重要意义。由于生活舱设备外形和结构相当复杂,难以建模,因此按照速度梯度、湿度梯度较大的优先原则,合理选择简化舱体结构及舱内设备。采用基于有限元网格的控制容积法对计算区域离散,对离散方程组求解得出水汽质量浓度分布后,结合舱内温度场通过一定的转换关系最终得到了生活舱内部的湿度分布。数值分析结果表明生活舱内处于相对湿度较高的状态下,提示还需进一步采取措施以改善舱内湿度水平。

Steady Numerical Simulatiion for the Humidity Distribution in Manned Spacecraft Habitation Cabin

It is important to study the humidity distribution in manned spacecraft habitation cabin. Because of the apparatus shape and structure's complexity it is difficulty to make analyse model, so the apparatus within the cabin are reasonably chosen and simplified by using the principle of velocity gradient and humidity gradient magnitude. A finite-element grid based control volume method is adopted to discrete computation field, the moisture mass concentration distribution is obtained through the solution to the discrete equations,finally according to temperature distribution and definite conversion relation,the relative humidity distribution is also obtained. The numerical analysis result indicates that the relative humidity is a little high, so it is necessary to take more measure to improve the humidity environment in the cabin.