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

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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

Abstract

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

CLC Number:

TH137

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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