热负荷变化对加热管内正十烷的振荡数值研究

中国民航大学学报

热负荷变化对加热管内正十烷的振荡数值研究

田静¹，侯宇¹，周伟星^2a，肖雪峰^2b，王广飞^2a

（1援中国民航大学航空工程学院，天津300300；2.哈尔滨工业大学a.基础与交叉科学研究院；b.能源科学与工程学院，哈尔滨150006）

收稿日期:2017-04-18 修回日期:2017-05-16 出版日期:2017-12-27 发布日期:2017-12-15
作者简介:田静（1972—），女，辽宁抚顺人，教授，博士，研究方向为液压伺服系统、飞机维修理论及故障诊断技术.

Study on oscillation of n-decane in heating pipes by heat load change

TIAN Jing¹, HOU Yu¹, ZHOU Weixing^2a, XIAO Xuefeng^2b, WANG Guangfei^2a

(1. College of Aeronautical Engineering, CAUC, Tianjin 300300, China; 2a. Foundation and Cross Science Research Institute; 2b. School
of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150006, China)

Received:2017-04-18 Revised:2017-05-16 Online:2017-12-27 Published:2017-12-15

摘要/Abstract

摘要： 通过实验研究发现超临界吸热碳氢燃料燃油系统在供给过程中产生了振荡现象，为了进一步认识这一现象产生的机理，采用碳氢燃料中的主要成分正十烷作为研究对象，分别编写线性变化和阶跃型变化的两类壁面热负荷调节程序，考察热负荷变化对正十烷动态特性影响。研究结果表明：壁面热负荷变化越快，其出口质量流量超调值越大，温度与速度振荡现象越显著；热负荷阶跃幅值越大处于拟临界范围内的正十烷温度场的振荡现象越显著,其速度场的振荡幅度越大,振荡频率也越高；壁面热负荷的变化速率与变化幅度都会引起拟临界温度范围内正十烷的振荡，从而造成燃油系统的供给出现不稳定现象。

关键词: 超临界压力, 正十烷, 动态特性, 热负荷变化, 振荡

Abstract: Experimental study found that the supercritical endothermic hydrocarbon fuel system in supply process has produced oscillation. In order to further understand the mechanism of this phenomenon, two kinds of wall heat load regulation programs, linear change and step type change are prepared by using the decantation of the main component of hydrocarbon fuel as research object. Results show that the faster the wall heat load changes, the greater the overshoot value of outlet mass flow, the more significant temperature and velocity oscillations become. The larger the amplitude of thermal load is, the greater the oscillatory phenomenon of n -decane temperature field in quasi-critical range become, the greater the o scillation amplitude of velocity field and oscillation frequency are. The rate of change and amplitude of wall heat load can lead to oscillation of n-decane in quasi-critical temperature range, which can cause instability of fuel system supply.

Key words: supercritical pressure, n-decane, dynamic characteristics, heat load change, oscillation

中图分类号:

TH137

田静，侯宇，周伟星，肖雪峰，王广飞. 热负荷变化对加热管内正十烷的振荡数值研究[J]. 中国民航大学学报.

TIAN Jing, HOU Yu, ZHOU Weixing, XIAO Xuefeng, WANG Guangfei. Study on oscillation of n-decane in heating pipes by heat load change[J]. .

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