环境温度对底排效应的影响  

INFLUENCE OF AMBIENT TEMPERATURE ON BASE BLEED EFFECT

作　　者：丁则胜[1] 陈少松[1] 刘亚飞[1] 曹顶贵[1] 

机构地区：[1]南京理工大学动力工程学院,南京210094

出　　处：《弹道学报》2003年第1期37-40,共4页Journal of Ballistics

摘　　要：环境温度对底排效率具有显著影响 ,文中采用热主流风洞实验方法研究了这种影响 .实验结果表明 :随着来流温度的升高 ,底排减阻率下降 ,二者呈非线性关系 ;M数对底排减阻率的温度效应影响较大 ,M =2 2时出现峰值 ,而排气率对其影响可以忽略 .用实验结果计算环境温度对底排弹射程影响与射击实验结果一致 。Ambient temperature has notable effect upon base bleed effect. This paper studies the influence of ambient temperature on drag reduction rate of base bleed by hotted free stream wind tunnel experiments. Results show that the drag reduction rate of base bleed is lower as the temperature of free stream is higher, and variations are nonlinearity. The influence of free stream Mach numbers on temperature effect of drag reduction rate of base is big. When M =2 2 it appears a peak. But the influence of injection rate of base bleed is negligible. Influence of ambient temperature calculated by this test data on range of a base bleed projectile is agreement with results of fire experiments in varied season. The effect mechanism analysis is also explained in this paper.

关 键 词：环境温度 底排效应 影响 底排弹 风洞实验 减阻效率 

分 类 号：TJ413.7[兵器科学与技术—火炮、自动武器与弹药工程]