一次调节通道流阻特性的数值模拟  

Numerical simulation on the flow characteristics of the primary metering groove

作　　者：杨卫华[1] 程惠尔[1] 蔡岸[1] 

机构地区：[1]上海交通大学工程热物理研究所,上海200030

出　　处：《推进技术》2003年第2期115-117,共3页Journal of Propulsion Technology

摘　　要：为了研究冷却剂在层板发汗冷却推力室一次调节通道中的流动特性,引入了粗糙粘度μ_R的概念及其计算式,用有效粘度μ_1,eff代替分子粘度μ,导出了冷却剂在一次调节通道中层流流动的N-S方程并对其进行了数值求解。计算结果表明,利用μ_1,eff=μ_R+μ代数模型计算得到的流动结果与试验数据吻合较好,说明冷却剂在D_h≈0.16mm～0.18mm的一次调节通道中层流流动时,可不计微小尺度的效应,但应考虑壁面粗糙度对流动的影响。In order to study the flow characteristics of the coolant in primary metering groove, the N-S equation suitable for the laminar flow in primary metering groove was obtained by introducing the concept of roughness-viscosity model μR, replacing the viscosity μ with the effect viscosity μ1,eff and then calculating. The numerical prediction shows that the calculation results obtained from the model μ1,eff=μR+μ are in good agreement with the experimental results. It indicates that, for the coolant laminar flow in the primary metering grooves with the hydraulic diameter Dh0.16 mm-0.18 mm, the micro-scale effect could be neglected, but the effect of surface roughness on the fluid flow must be considered.

关 键 词：推力燃烧室 发汗冷却 流动特性 流体阻力 数值仿真 

分 类 号：V434.14[航空宇航科学与技术—航空宇航推进理论与工程]