摘要
建立了盖瑞特TB25型涡轮增压器蜗壳内部流道几何模型,并使用三维CFD软件AVL Fire对此模型的可压缩、粘性三维流场进行了数值模拟。分析表明,在进气蜗壳的拐角处速度有明显的降低,且局部产生旋涡。对此处进行了修改,并重新分析了涡轮内部的流动情况。结果是,该处的速度等值线分布均匀,没有出现速度明显降低的情况,且较之修改前总-静效率提高了0.12%。
A geometry model of Garrett TB25 turbocharger volute internal flow channel is established. 3D viscous compressible flow field in this model is simulated by CFD software AVL Fire. The analysis shows that velocity at corner of intake volute decreases dramatically, and swirl appears at local areas. Modification is made to this area, and flow inside turbine is re-analyzed. The result is, contoured velocity at this area is distributed evenly, and velocity does not decline apparently, and total-static efficiency compared with that before modification is increased by 0.12%.
出处
《汽车技术》
北大核心
2011年第9期1-3,10,共4页
Automobile Technology
关键词
涡轮增压器
蜗壳
流场
模拟分析
Turbocharger, Volute, Flow field, Simulation analysis
