Study on diesel engine exhaust particle separation based on gas–solid two-phase flow theory

Particulate matter in diesel exhaust is one of the primary sources of environmental pollution. This paper mainly studies the purification treatment of particulate matter in exhaust gas. It also studies the stress conditions and moving process of particulates in straight and elbow pipes respectively and explores their capture efficiency on the basis of that the gas–solid two-phase flow composed of particulates and gas is a basic fluid state. This paper mainly analyzes the influence of straight and elbow pipe on the moving process of particulates. It also discusses the impact of the structure parameters of the elbow on the exhaust pressure of inlet and outlet of pipes to provide basis for its designing. In addition, experiment is carried out to verify the capture efficiency of particulates by elbow pipes under different working conditions of diesel engines. The experiment results show that the capture efficiency is improved and separation of particulates is more effective.