摘要
为考查某型直升机附件舱的热控制能力,采用有限元软件分析了其在强制冷却和自然冷却情况下的温度场分布.应用非结构化网格和有限体积法进行计算区域和控制方程的离散,采用标准k-ε模型封闭湍流控制方程.针对3种冷却系统设计方案,分析了不同冷却气流进口尺寸、相对位置以及不同附件散热量对附件舱温度分布的影响,计算了自然冷却情况下附件舱密闭时的温度场.计算和试验结果均表明,所采用的冷却方案可以满足附件舱冷却的需要.
In order to test the thermal control ability of a helicopter accessory cabin with forced ventilation cooling and free cooling, the temperature field was analyzed based on the finite element software. Unstructured grid and finite volume method were applied for region and governing equation discreteness, and standard k-ε model was used as turbulent model.The influence on temperature distribution by changing size and position of cooling air inlet as well as heat dissipating capacity from accessories was discussed for 3 cooling schemes. And the temperature field was calculated for the close cabin under free cooling. The calculation and test results show that the forced cooling scheme can meet the cooling requirements.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2008年第4期629-634,共6页
Journal of Aerospace Power
基金
国家重点项目协作课题
关键词
航空、航天推进系统
直升机
数值模拟
温度场
有限体积法
aerospace propulsion system
helicopter
numerical simulation
temperature field
FVM （finite volume method）
