热泳力作用下柴油机微粒在冷却通道中沉降规律研究

对热泳力作用下柴油机微粒在冷却通道中的沉降规律进行了研究。推导建立了热泳沉降率数学模型，在此基础上分析了在热泳力作用下，微粒大小、排气流速、排气与壁面温差以及通道尺度等因素对柴油机微粒在冷却通道中热泳沉降率的影响规律。研究结果表明，热泳力对柴油机微粒具有一定的脱除作用，通过合理设计和控制冷却通道的结构和运行参数，可以有效地提高柴油机微粒在冷却通道中的沉降率。热泳沉降技术为柴油机微粒的净化以及柴油机微粒分布的改善提供一条有效的途经。

Study on Deposition Characteristics of Diesel Engine Particles under Thermophoresis Force in Cooling Tube

In this paper, the deposition characteristics of diesel engine particles under thermophoresis force in cooling tube were studied by the method of parameter analysis. Mathematical model of thermo- phoresis deposition efficiency was proposed. Based on the model, the effects of particle size, exhaust velocity, temperature difference between exhaust and cooling wall, and tube dimension on the thermophoresis deposition efficiency of diesel engine particles in the cooling tube were investigated parametrically. The simulated results showed that in cooling tube the thermophoresis force had removing effect on the diesel engine particles, and it is possible to increase the deposition efficiency of diesel engine particles in cooling tube by rational design and control of the cooling tube structure and working parameters. The technology of thermophoresis deposition can provide an effective method to eliminate diesel engine particles and improve particle size distribution.