超临界压力下航空煤油热声振荡的特性和预测

doi:10.11949/j.issn.0438-1157.20170956

化工学报 ›› 2018, Vol. 69 ›› Issue (4): 1412-1418.DOI: 10.11949/j.issn.0438-1157.20170956

超临界压力下航空煤油热声振荡的特性和预测

王彦红^1,2, 李素芬²

1. 东北电力大学能源与动力工程学院, 吉林省吉林市 132012;
2. 大连理工大学能源与动力学院, 辽宁大连 116024

收稿日期:2017-07-25 修回日期:2017-11-14 出版日期:2018-04-05 发布日期:2018-04-05
通讯作者: 王彦红
基金资助:
国家自然科学基金项目（51576027）；东北电力大学博士科研启动基金项目（BSJXM-2017205）。

Characteristic and prediction of thermo-acoustic oscillation of aviation kerosene under supercritical pressures

WANG Yanhong^1,2, LI Sufen²

1. School of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, Jilin, China;
2. School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China

Received:2017-07-25 Revised:2017-11-14 Online:2018-04-05 Published:2018-04-05
Supported by:
supported by the National Natural Science Foundation of China(51576027) and the Scientific Research Foundation for Doctors of Northeast Electric Power University(BSJXM-2017205).

摘要/Abstract

摘要：

对竖直上升圆管内超临界压力航空煤油的热声振荡型流动不稳定开展了实验研究。基于边界层理论揭示了热声振荡的形成机理和发展过程，阐述了运行参数对热声振荡边界的影响机制，通过进口拟过冷度和出口拟相变数建立了热声振荡边界的预测准则，解决了热声振荡的终态换热预测问题。结果表明，热物性剧烈波动使稳定的流动边界层和热边界层遭到破坏，引发了强化换热的热声振荡型不稳定流动现象。热声振荡临界热通量随着质量流速和进口温度提高均增加。高压力下流体热物性变化平缓，流动稳定性增强，更难出现热声振荡现象。热声振荡临界出口拟相变数随着进口拟过冷度增加近似线性下降，从而为避免不稳定流动现象提供了判别依据。

关键词: 超临界流体, 航空煤油, 不稳定性, 边界, 传热, 预测

Abstract:

The flow instability with a type of thermo-acoustic oscillation of aviation kerosene at supercritical pressures in a vertical upward circular tube was investigated. The formation mechanism and development process of thermo-acoustic oscillation were revealed based on the boundary layer theory. The effect mechanisms of operational parameters on thermo-acoustic oscillation border were analyzed. The prediction criterion for thermo-acoustic oscillation border was established by the sub-pseudo-critical number and trans-pseudo-critical number. The prediction problem for final state heat transfer of thermo-acoustic oscillation was solved. Results indicate that the stable flow and thermal boundary layers are destroyed owing to the drastic thermo-properties fluctuations. They lead to the thermo-acoustic oscillation flow instability phenomenon with enhanced heat transfer capability. The critical heat flux of thermo-acoustic oscillation increases with the increasing mass flow rate and inlet temperature. The thermo-properties variations tend to gentle as the pressure increases, hence the flow stability is enhanced and the thermo-acoustic oscillation does not appear easily. The critical trans-pseudo-critical number for thermo-acoustic oscillation approximately linear decreases with the increasing sub-pseudo-critical number. It consequently provides a discriminating criterion to avoid the flow instability phenomenon.

Key words: supercritical fluid, aviation kerosene, instability, border, heat transfer, prediction

中图分类号:

V231.1

王彦红, 李素芬. 超临界压力下航空煤油热声振荡的特性和预测[J]. 化工学报, 2018, 69(4): 1412-1418.

WANG Yanhong, LI Sufen. Characteristic and prediction of thermo-acoustic oscillation of aviation kerosene under supercritical pressures[J]. CIESC Journal, 2018, 69(4): 1412-1418.

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超临界压力下航空煤油热声振荡的特性和预测

Characteristic and prediction of thermo-acoustic oscillation of aviation kerosene under supercritical pressures

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