油焦浆喷射器头部颗粒物浓度分析  

An Analysis on the Particle Concentration in the Head of the Injector for Petroleum Coke Oil Slurry

作　　者：向立明[1] 汪云[1] 马强[1] 

机构地区：[1]湖北文理学院机械与汽车工程学院,襄阳441053

出　　处：《汽车工程》2013年第5期408-412,共5页Automotive Engineering

基　　金：国家863项目(2012AA111100);湖北省自然科学基金(2010CDZ049);湖北省高等学校优秀中青年团队计划项目(T201114)资助

摘　　要：为深入分析传统柴油机喷油器喷射油焦浆喷嘴容易堵塞,而油焦浆发动机油焦浆喷射器则能正常工作的原因,使用CFD软件模拟计算了颗粒物在传统喷油器和油焦浆喷射器头部中的体积浓度分布。结果表明传统喷油器头部轴针与喷孔狭窄空腔处固体颗粒物体积分数较大,因而首先容易在喷孔处发生固体颗粒物堵塞,导致油焦浆喷射雾化变差;而油焦浆喷射器头部喷孔处固体颗粒物体积分数较小,不易发生堵塞,但与高压油焦浆入口相对的密封锥面上台阶处固体颗粒物体积分数仍较高,也容易发生固体颗粒物堆积。改为双入口后,情况会有改善。To analyze the reason for that the traditional injector nozzle in diesel engine is easily clogged up when spraying petroleum coke oil slurry （PCOS） while the special injector nozzle for PCOS engine can work normal- ly, the volume concentration distribution in the heads of both traditional and special injector nozzles is simulated with CFD software. The results show that the volume fraction of particles in the narrow cavity between pintle and oririce in the head of traditional injector is relatively high, so the orifice is easily blocked up with particles, leading to poor atomization of PCOS, while the volume fraction of particles in the orifice of the head of special injector is relatively low, hence the blockage in orifice is unlikely to happen. However the volume fraction of particles on the step area of the seal cone on the opposite side of high pressure PCOS inlet is still high, where the accumulation of particles is easy to occur, but the situation can be improved when adopting double inlets.

关 键 词：油焦浆 喷射器 颗粒物 模拟 

分 类 号：TK428.9[动力工程及工程热物理—动力机械及工程]