Study on wall pressure and hysteresis behaviors of a novel dual-bell nozzle
Study on wall pressure and hysteresis behaviors of a novel dual-bell nozzle
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DOI：
10.1007/s12206-023-0819-5
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发表时间：
2023-09
影响因子：
1.6
通讯作者：
Kexin Wu;Gerald Canaan Sohn;R. Deng;H. Jia;Heuy Dong Kim;Xianghui Su
中科院分区：
文献类型：
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作者：
Kexin Wu;Gerald Canaan Sohn;R. Deng;H. Jia;Heuy Dong Kim;Xianghui Su
双钟形喷管是一种高度自适应喷管，用于提高空间发射装置和未来可重复使用运载火箭的性能。对平面双钟形喷管分别在海平面、“潜行”过渡和高空模式下的流动特性进行了数值研究。计算流体动力学的发现与公开文献中的实验数据进行了对比。将不同湍流模型下双钟形喷嘴沿壁面的归一化压力分布与固定喷嘴压力比（NPR）为29.8时的实验压力测量结果进行了比较。在6 ~ 55的大范围内，NPR值逐渐升高，以揭示流动特性的演变。研究了沿喷嘴壁面和激波位置的压力分布。在靠近轮廓拐点的双钟形喷嘴中出现了滞后现象。详细阐述了壁压和滞回特性。
The dual-bell nozzle is a kind of altitude adaptive nozzle for improving the performance of space launchers as well as future reusable launch vehicles. Numerical investigations have been conducted on a planar dual-bell nozzle to illustrate the flow characteristics at sea level, “sneak” transition, and altitude modes, respectively. Findings from computational fluid dynamics have been contrasted with experimental data from the open literature. The normalized pressure distributions along the dual-bell nozzle wall for different turbulence models are compared to the pressure measurements taken during the experiment by fixing the nozzle pressure ratio (NPR) at 29.8. The NPR value gradually rises across a large range from 6 to 55 to explore the evolution of the flow characteristics. The pressure distributions along the nozzle wall and shock position have been investigated. The hysteretic behaviors occur in dual-bell nozzles close to the contour inflection. The wall pressure and hysteresis behaviors have been expounded in detail.