| 1. | Large water flow by the main pump . allows very low nozzle pressure and achieve no pilling , no
分开来，可轻易获得压力很低，但水量很大的柔 |
| 2. | 3 the nozzle pressure and the solution flux set up a magnificent influence on the powder yield , and the yield evidently rise as the pressure dose
从产率上来看，压力和流量对产率的影响最大。随压力和流量的增加，产率明显增大。 |
| 3. | And the affect of nozzle pressure ratio , nozzle area ratio and geometric defected angle on the performance parameters is also investigated . 4
研究了影响矢量喷管性能的因素，研究了压比、面积比以及几何偏角对矢量喷管性能的影响。 |
| 4. | Then the nozzle was simulated to study the variation of its performance under different nozzle pressure ratios , flow conditions and with different configurations of the cowl
同时研究了不同的压强比,外流场条件以及喷管可调面罩结构等对喷管性能的影响。 |
| 5. | More than 200 different condition 3d viscosity steady flow fields in the thrust vectoring nozzle at different nozzle pressure ratio and different nozzle area ratio and different geometric defected angle is calculated by the program developed . and the related performance parameters are acquired by numerical simulation
利用该程序计算了某矢量喷管在不同的压比、面积比和几何偏转角下的200多种三维有粘流场，获得了矢量喷管的性能数据。 |
| 6. | As the ratio of alcohol to water descends , both of them rise . as the solution concentration of nitrates descends , the crystalline size firstly descends and then rises . the nozzle pressure brings forth little affluence on the crystalline size of the powder , but the elevated pressure can enlarge the quantity and the size of the agglomeration
随酒精和水的比值的减小，粒径和颗粒粒径都增加；粒径随溶液浓度的减小，先减小后增加；一次粒径随压力的变化，变化很小，但随压力和流量的增加，团聚体增多、团聚粒径增大。 |
| 7. | Cfd is also used to get the data of performance parameters of the nozzle at different nozzle pressure ratio , different nozzle area ratio and different geometric defected angle . the theory of function approximation is used to establish the transient model of thrust vectoring with the data calculated
本文通过cfd计算获得矢量喷管的性能参数，如流量系数、推力系数以及有效推力矢量角等与矢量喷管压比、面积比以及几何偏转角之间的关系数据，并利用函数逼近理论建立了矢量喷管的动态数学模型。 |
