燃料裂解特性对供油系统稳定性的影响

推进技术 ›› 2013, Vol. 34 ›› Issue (12): 1702-1707.

燃料裂解特性对供油系统稳定性的影响

于彬¹,周伟星²,于文力¹,葛旭梅³,于达仁¹,鲍文¹

哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨 150006;哈尔滨工业大学基础与交叉科学研究院,黑龙江哈尔滨 150006;哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨 150006;北京动力机械研究所,北京 100074;哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨 150006;哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨 150006

发布日期:2021-08-15
作者简介:于彬(1987—),男,博士生,研究领域为发动机热防护,推进系统热力循环,热力系统动态学。 E-mail:yubin0878@gmail.com

Effects of Fuel Cracking Characteristic on Stability of Fuel Supply System

College of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150006,China;College of Fundation and Interdisciplinary Science, Harbin Institute of Technology, Harbin 150006,China;College of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150006,China;Beijing Power Machinery Institute, Beijing 100074, China;College of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150006,China;College of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150006,China

Published:2021-08-15

摘要/Abstract

摘要： 通过实验研究发现了超临界吸热型碳氢燃料供油系统的压力降型不稳定现象。为了研究稳定机理和超临界吸热型碳氢燃料裂解特性对供油系统稳定性的影响,建立了零维平衡流模型,并针对不同裂解特性的燃料进行了对比仿真。研究结果表明,由于裂解反应的发生,超临界碳氢燃料供油系统存在临界区和裂解区两个不稳定区间。基于零维平衡流模型较好地复现不稳定实验现象,不稳定机理得到了详细的解释。密度随温度的变化是系统正反馈的重要环节之一,其剧烈的变化率是导致系统不稳定的主要原因,燃油裂解速率越快,其裂解产物密度相对变化率随温度变化越大,越容易引起供油系统的不稳定。 

关键词: 冷却系统;碳氢燃料;不稳定;裂解 

Abstract: Pressure drop type instability of supercritical endothermic hydrocarbon fuel supply system was founded in an experiment. In order to analyze the instability mechanism and the effects of fuel cracking characteristic on the stability of the fuel supply system, a zero-dimension homogeneous model was established. Instability simulation results of fuel with different cracking characteristic were compared. The results show that there exist two instable region in the supercritical hydrocarbon fuel supply system, namely, critical temperature region and cracking temperature region. Based on the excellent agreement between the experiment data and the simulation results calculated by the zero-dimension homogeneous model, the instable mechanism is interpreted. As a link in the positive feedback loop, the acute decrease of the fuel density is a main factor resulting in the instable phenomenon. Based on the compared simulation results, the more acute the density changes with temperature while the fuel is cracking, the more instable the system will be. 

Key words: Cooling system; Hydrocarbon fuel; Instability; Cracking

于彬,周伟星,于文力,葛旭梅,于达仁,鲍文. 燃料裂解特性对供油系统稳定性的影响[J]. 推进技术, 2013, 34(12): 1702-1707.

YU Bin¹, ZHOU Wei-xing², YU Wen-li¹, GE Xu-mei³, YU Da-ren¹, BAO Wen¹. Effects of Fuel Cracking Characteristic on Stability of Fuel Supply System[J]. Journal of Propulsion Technology, 2013, 34(12): 1702-1707.

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