A design method of high flow capacity exhaust duct

Abstract

The invention provides a method for designing a high-flow capacity exhaust passage, which is proposed based on the flow mechanism of the pipeline and theoretical formulas, and the designed exhaust passage has high flow capacity, is not limited to a specific air passage structure, and has universality , can truly realize the positive design of the air passage, and meet the ventilation requirements of high power density internal combustion engines.

Description

technical field [0001] The invention belongs to the field of engine design, and in particular relates to a method for designing an exhaust channel with high flow capacity. Background technique [0002] The internal combustion engine has the characteristics of high thermal efficiency, large power range, and strong adaptability, and is widely used in industry, agriculture, and military fields. Facing the deteriorating energy and environmental situation in the world today, energy conservation and emission reduction have become the focus of the new generation of internal combustion engines, which requires them to pay more attention to economy and emissions while ensuring power. The development of high power density internal combustion engines is the main measure to further improve the efficiency of internal combustion engines and reduce CO2 emissions. Increasing the calibrated speed is one of the important ways to achieve high power density, but high speed will make the charging...

AI Technical Summary

Problems solved by technology

[0004] At present, for the design of the exhaust duct, although the optimization design method based on the CFD simulation method replaces the traditional test method and has achieved obvious results, saving manpower and material resources, but the CFD simulation optimization is ultimately a reverse design, and it is difficult to avoid multiple rounds in the optimization process. Times of attempts, a lot of time consumption is still unavoidable

Moreover, although the reverse optimization can improve the flow capacity of the exhaust duct, it is easy to encounter bottlenecks due to the lack of guidance from the theoretical system, and the reverse optimization will gradually become incapable with the increase in the flow capacity requirements of the exhaust duct.

Images