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PIV measurements of coolant flow field in a diesel engine cylinder head
  • ISSN号:1003-2169
  • 期刊名称:Journal of Thermal Science
  • 时间:2015
  • 页码:1-6
  • 分类:V231.3[航空宇航科学与技术—航空宇航推进理论与工程] TH453[机械工程—机械制造及自动化]
  • 作者机构:[1]Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics, [2]School of Energy and Power Engineering, Beihang University, Beijing, 100191, China, [3]Collaborative Innovation Center of Advanced Aero-Engine, Beijing, 100191, China
  • 相关基金:The authors would like to thank YU Xianjun and AN Guangfeng for their critical and constructive review of the manuscript. This study was co-supported by the National Natural Science Foundation of China (Grant No.51161130525/ No.51136003), the 111 Project (No.B07009), and the Innovation Foundation of BUAA for PhD Graduates (No.YWF-14-YJSY-014).
  • 相关项目:叶轮机械内复杂流动的先进实验与数值模拟研究
中文摘要:

不一致的尖端几何学是在 turbomachinery.However 的一种有希望的被动流动控制技术,是众所周知的,它 turbomachinery 的不稳定的流动域上的效果的详细调查在 existingliteratures 是稀罕的。这份报纸两个都论述吸方面 squealer 尖端 configurationon 的效果的试验性的调查一个孤立的压缩机转子的稳定、不稳定的流动地。在从后面的边下游的 10% 弦的流动地用微型被测量五洞的探查。同时,在经过内的不稳定的流动地用立体声粒子图象 velocimetry (懒汉) 被调查。稳定的结果证明 SSQ 尖端配置在转子插头在这台压缩机,和光线的平衡的静态的压力上升表演上施加积极效果显然被重排。SSQ 尖端配置将在形成阶段创造一个更强壮的尖端漏旋涡,并且它在后面的弦附近经历一个更快的驱散过程。另外,尖端漏旋涡的切开的过程是 severer,它是 streamwise 颠倒流动的存在的相对更高的概率的主要原因。尖端漏旋涡的份量上分析显示在阻塞区域内的速度损失是尖端漏旋涡的进化过程的直接反应。它不停地增加直到切开的过程的结束。尽管阻塞 coefficientgrows sustainably,一旦狂暴的混合过程是主导的,速度损失将减少。

英文摘要:

It is well known that the non-uniform tip geometry is a promising passive flow control technique in turbomachinery.However,detailed investigation of its effects on the unsteady flow field of turbomachinery is rare in the existiug hteratures.This paper presents an experimental investigation of effects of suction side squealer tip configuration on both the steady and unsteady flow field of an isolated compressor rotor.The flow field at 10%chord downstream from the trailing edge was measured using a mini five-hole probe.Meanwhile,the unsteady flow field inside the passage was investigated using stereo particle image velocimetry(SPIV).The steady results show that the SSQ tip configuration exerts positive effect on the static pressure rise performance of this compressor,and the radial equilibrium at the rotor outlet is obviously rearranged.The SSQ tip configuration would create a stronger tip leakage vortex at the formation phase,and it experiences a faster dissipation process around the rear chord.Also,the splitting process of the tip leakage vortex is severer,which is the main cause of the relatively higher probability of the presence of the streamwise reverse flow.The quantitatively analysis of the tip leakage vortex indicates that the velocity loss inside the blockage region is direct response of the evolutionary procedure of the tip leakage vortex.It keeps increasing until the end of the splitting process.Although the blockage coefficient grows sustainably,the velocity loss will reduce once the turbulent mixing procedure is dominant.

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期刊信息
  • 《热科学学报:英文版》
  • 主管单位:中国科学院
  • 主办单位:中国科学院工程热物理研究所
  • 主编:
  • 地址:北京市2706信箱
  • 邮编:100080
  • 邮箱:
  • 电话:010-62571060
  • 国际标准刊号:ISSN:1003-2169
  • 国内统一刊号:ISSN:11-2853/O4
  • 邮发代号:
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  • 国内外数据库收录:
  • 美国化学文摘(网络版),荷兰文摘与引文数据库,美国工程索引,美国科学引文索引(扩展库),英国科学文摘数据库
  • 被引量:147