结构参数对环簇式塞式喷管性能的影响  

Effect of configurative parameter on the performance of clustered plug nozzles

作　　者：任军学[1] 刘宇[1] 谢侃[1] 

机构地区：[1]北京航空航天大学宇航学院,北京100191

出　　处：《航空动力学报》2010年第2期477-482,共6页Journal of Aerospace Power

基　　金：国家自然科学基金(50476002)

摘　　要：为研究环簇式塞式喷管设计中人为选择的结构参数对性能的影响,在单元间距与内喷管出口直径比、单元喷管数目、内喷管面积比分别相同的前提下,计算并比较了三种塞式喷管的推力效率.结果表明,高空下内喷管面积比30.2的8单元接触式的效率最高,而低空下内喷管面积比20.7的8单元间隔式的效率最高.因此在总面积比一定的情况下,若塞式喷管在中低空高度下工作,则单元内喷管面积比可取得小些,以保证中低空下的效率;反之,则单元内喷管面积比尽量取得大些.In order to investigate the effect of uncertain design parameters on the performance of cluster plug nozzles in design method, two types of 8-module and one type of 16-module clustered plug nozzles were designed with the same total area ratio and shape size. Their thrust efficiencies were calculated numerically, and also compared respectively under the condition of same module gap and diameter ratio, module number and module area ratio. The 8 touched module clustered plug nozzle with module area ratio of 30.2 had the highest efficiency in high attitude and the 8-separated-module clustered plug nozzle with module area ratio of 20.7 had the highest efficiency in low attitude. In the design procedure, a bigger module area ratio can be selected to enhance its performance when the clustered nozzle works in medium and low attitude, otherwise a smaller one can be selected.

关 键 词：火箭发动机 塞式喷管 结构参数 数值模拟 性能分析 

分 类 号：V430[航空宇航科学与技术—航空宇航推进理论与工程]