Rijke管热声不稳定的实验研究  

Experimental Study on Thermoacoustic Instability in a Rijke Tube

作　　者：杨亚晶[1,2] 王万征[1,2] 

机构地区：[1]西安交通大学航天航空学院,西安710049 [2]西安交通大学机械结构强度与振动国家重点实验室,西安710049

出　　处：《西安交通大学学报》2014年第5期21-26,共6页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(11102151);教育部高等学校博士学科点专项科研基金资助项目(20110201120022);中国博士后科学基金资助项目(2012M512009);中央高校基本科研业务费专项资金资助项目

摘　　要：针对推进系统常发生的具有破坏性的热声振荡现象,为了获得热声振荡的共振频率信息并提供一种有效的抑制途径,自行搭建了Rijke管热声振荡实验测试平台,在不同热源位置、不同热源功率及不同空气流速等条件下测量了热声振荡的频率及声压。实验测得的热声振荡频率均在110~117Hz之间,属低频振荡,且热声振荡的频率和声压随热源功率和空气流量的增加整体呈现升高的趋势;相反,随着热源的后移,共振频率下降,当热源在Rijke管的1/4处时,热声振荡的发声强度达到最大。此外,随着热源功率和空气流速的增加,热声不稳定的区域随之增大。实验结果与理论计算结果吻合良好,从而可为推进系统热声振荡的主被动联合控制方法提供丰富、可靠的实验数据。In view of destructive thermoacoustic instability in propulsion systems, it is necessary to obtain oscillation frequency and then develop an effective approach to suppress this instability. A Rijke tube was constructed to measure the oscillation frequency in the experimental conditions of different heat source position, heat source power and air flow rate. The measured oscillation frequencies got 110-117 Hz, and the oscillation frequency and sound intensity rose with the increasing heat source power and air flow rate, while the oscillation frequency lowered with the heat source moving afterwards, the sound intensity reached the maximum when heat source was set at the position of a quarter of Rijke tube length, and the thermoacoustic instability region extended with increasing heat source power and air flow rate. All experimental results coincide well with the theoretical predictions. The experimental data obtained may facilitate developing active/passive combined suppression of thermoacoustic oscillation for practical propulsion systems.

关 键 词：推进系统 RIJKE管 热声振荡 主被动联合控制 

分 类 号：V231.12[航空宇航科学与技术—航空宇航推进理论与工程]