CAJ | 학술논문

以FLUENT软件为工具，利用动网格技术，建立了喉栓式推力可调喷管内流场动态特性分析模型。通过网格的合并与分割，较好地解决了喉栓调节运动所导致的计算区域的瞬变问题，并分析了喉栓调节运动速度对喷管轴对称二维内流场动态特性的影响。分析结果表明，随着喉栓的调节运动，喷管内流场动态下的压强建立与稳态下的压强建立相比存在着明显的延迟，且随着喉栓调节运动速度的增大，延迟现象越明显。当喉栓完全进入喷管几何喉部位置时，喷管推力达到最大值。
이FLUENT연건위공구，이용동망격기술，건립료후전식추력가조분관내류장동태특성분석모형。통과망격적합병여분할，교호지해결료후전조절운동소도치적계산구역적순변문제，병분석료후전조절운동속도대분관축대칭이유내류장동태특성적영향。분석결과표명，수착후전적조절운동，분관내류장동태하적압강건립여은태하적압강건립상비존재착명현적연지，차수착후전조절운동속도적증대，연지현상월명현。당후전완전진입분관궤하후부위치시，분관추력체도최대치。
In order to study dynamic flow field of the pintle-controlled nozzle,physical model was established based on dynamic grid of FLUENT.Dynamic flow field of nozzle was simulated by the mesh of merging and splitting to solve computational flow transi-ent problems which was caused by pintle motion,and the effect of pintle motion velocity on 2D axisymmetric nozzle flow filed dynam-ic characteristics was analyzed.The results show that with the movement of pintle,the nozzle flow field changes significantly.With the increasing of the pintle velocity,there exist a significant hysteresis of pressure distribution in unsteady condition in comparison with steady condition,and when pintle velocity increases,the hysteresis increases.When the pintle is completely into the throat of the noz-zle geometry position,the thrust reaches to maximum value.