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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 study the influence of structural parameters on the performance of ring-type plug nozzle design, in the premise of the unit spacing and nozzle exit diameter ratio, the number of nozzle unit and the nozzle area ratio are the same The thrust efficiencies of the three plug nozzles were compared.The results show that the efficiency of the 8-cell contact system with the nozzle area ratio higher than 30.2 at high altitude is the highest, while the efficiency of the 8-unit spacers with the nozzle area ratio 20.7 at low altitude is the highest. Therefore, in the case of a certain total area ratio, if the nozzle-type nozzle at low altitude work, the unit nozzle area ratio can be made smaller, in order to ensure the efficiency of low-altitude; the other hand, the unit nozzle area Than try to get bigger.