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首页> 外文期刊>International Journal of Heat and Mass Transfer >Effect of parallel-jet addition on the shock train characteristics in a central-strut isolator by detached eddy simulation
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Effect of parallel-jet addition on the shock train characteristics in a central-strut isolator by detached eddy simulation

机译：分离涡模拟对平行喷流添加量对中杆隔振器冲击波特性的影响

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摘要

For the Rocket-Based Combined-Cycle (RBCC) engine, the addition of primary rocket jets makes both the flow field and the shock train structure more complicated. In this study, a three-dimensional Detached Eddy Simulation (DES) modeling was employed for the numerical analysis of a full-scale central-strut isolator. The characteristics of shock train for the flight Mach 3 were studied. As a result, under the effect of central high-velocity central jets and different back pressures, the structure of shock train could be changed. At the low back pressure, the expansion wave originated from the trailing edge of the central strut still existed, and one X-type shock wave was formed at downstream. Then the strength of the subsequent shock waves between the parallel-jets and the wall in shock train gradually decays. As the back pressure increased, the leading edge of the shock train moved upstream. The shock train was then transformed into two parts: one part was the oblique shock wave generated in the strut section; another was the quasi-normal shock waves formed in the mixing section within the region between the shear layer and the parallel jets. The origination of the first shock wave could cause the generation of the vortexes in the isolator. With the parallel-jet addition, as the vortexes were transported downstream, they broke up into small scales and in more random orientation at the back wall of the central-strut.
机译：对于基于火箭的联合循环（RBCC）发动机，附加的主要火箭喷嘴使流场和冲击波列架结构更加复杂。在这项研究中，采用了三维分离涡模拟（DES）建模来进行全尺寸中央撑杆隔离器的数值分析。研究了3号飞行器的冲击波列车的特性。结果，在中央高速中央射流和不同背压的作用下，冲击波列的结构可以改变。在低背压下，仍然存在源自中央支柱后缘的膨胀波，并且在下游形成了一个X型激波。然后，在平行射流和冲击波列中的壁之间的随后冲击波的强度逐渐衰减。随着背压的增加，减震器的前缘向上游移动。然后将冲击波转换为两部分：一部分是在支杆部分中产生的倾斜冲击波；另一部分是在支撑部分产生的倾斜冲击波。另一个是在剪切层和平行射流之间区域内的混合区域中形成的准法向冲击波。第一冲击波的产生可能会导致在隔离器中产生涡旋。随着平行射流的加入，由于涡流被向下游输送，它们在中央支杆的后壁处破碎成较小的比例并以更随机的方向破碎。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2017年第11期|1159-1168|共10页
  • 作者

    Xue Rui; Wei Xianggeng; He Guoqiang; Hu Chunbo; Tang Xiang;

  • 作者单位

    State Key Laboratory for Strength and Vibration of Mechanical Structures, Shaanxi Engineering Laboratory for Vibration Control of Aerospace Structures, School of Aerospace, Xi'an Jiaotong University, Xi'an, China,Science and Technology on Combustion, Internal Flow and Thermal-structure Laboratory, Northwestern Polytechnical University, Xi'an, China;

    Science and Technology on Combustion, Internal Flow and Thermal-structure Laboratory, Northwestern Polytechnical University, Xi'an, China;

    Science and Technology on Combustion, Internal Flow and Thermal-structure Laboratory, Northwestern Polytechnical University, Xi'an, China;

    Science and Technology on Combustion, Internal Flow and Thermal-structure Laboratory, Northwestern Polytechnical University, Xi'an, China;

    Xi'an Modern Control Technology Research Institute, Xi'an, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Boundary layer; Central-strut isolator; Primary jet addition; Shock train;

    机译：边界层;中央支柱隔离器;主射流增加;减震火车;

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