高温射流温度对导流槽混凝土冲刷剥蚀的影响  

Influence of jet flow temperature on erosion of concrete for flame diversion trough

作　　者：黄皓翔 查柏林 周伟 王金金 HUANG Haoxiang;ZHA Bailin;ZHOU Wei;WANG Jinjin(Rocket Force University of Engineering, Xi’an 710025, China;Project Management Center, Beijing 100085, China)

机构地区：[1]火箭军工程大学,西安710025 [2]火箭军装备部装备项目管理中心,北京100085

出　　处：《兵器装备工程学报》2022年第1期249-254,共6页Journal of Ordnance Equipment Engineering

基　　金：国家自然科学基金青年基金项目(520032960);陕西省自然科学基础研究计划项目(2020JQ-488);陕西省重点实验室基金项目(2019SZS-09);火箭军工程大学导弹工程学院青年基金项目(2019DYQNJJ-004)。

摘　　要：针对液体火箭发射过程中尾部高温射流对发射场导流槽混凝土产生机械冲刷剥蚀,以混凝土随机骨料模型为研究对象,选用燃气射流正向冲刷的方式进行传热仿真,通过采用计算流体力学技术与有限元分析方法对其进行热力耦合计算,分析传热过程中混凝土温度、应力分布与表面剥蚀形貌,进而揭示出射流温度变化对混凝土剥蚀行为的影响规律。结果表明:混凝土表面温度与孔隙应力随传热进程增加。当等效应力达到极限抗拉强度时,即发生剥蚀并呈麻面状;此外,剥蚀深度与质量损失量也随温度升高而逐渐加重,当环境温度达到1386℃时,混凝土质量损失率可达17.08%。In view of the fact that the high temperature jet at the flow caused erosion of the concrete for the diversion trough of the launching site while the liquid rocket launching,the random aggregate model of concrete was taken as the research object,and the heat transfer simulation was carried out by means of forward erosion of gas flow.The thermal-mechanical coupling calculation was carried out by CFD technology and FEA method,and the concrete temperature,stress distribution and surface denudation morphology in the heat transfer process were analyzed,thus revealing the influence law of jet temperature change on concrete erosion behavior characteristics.The results showed that the surface temperature and void stress of concrete increase with the heat transfer process.When the equivalent stress reaches the ultimate tensile strength,the erosion occurred and it is pitted;In addition,the erosion depth and mass loss increased gradually with the increase of temperature.When the ambient temperature increased up to 1386℃,the mass loss rate of concrete was 17.08%.

关 键 词：火箭尾焰 高温射流 混凝土 冲刷剥蚀 随机骨料模型 

分 类 号：TJ011.5[兵器科学与技术—兵器发射理论与技术] TU528.34[建筑科学—建筑技术科学]