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A three-dimensional simulation method for the working process of a supercharged diesel engine

A technology of working process and 3D simulation, applied in design optimization/simulation, mechanical equipment, combustion engine, etc., can solve the problem of ignoring the rotor response of the supercharger, and it is difficult to reveal the complex 3D of the rotating parts of the supercharger and the reciprocating parts of the cylinder piston Unsteady flow mechanism and matching characteristics and other issues, to achieve a strong guiding effect

Active Publication Date: 2021-05-28
ZHONGBEI UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to provide a three-dimensional simulation method for the working process of a supercharged diesel engine, to solve the problem that the existing simulation method for the working process of a supercharged diesel engine relies on a one-dimensional unsteady flow simulation method, depends on the steady-state characteristic curve of the supercharger, and ignores Supercharger rotor response problem, it is difficult to reveal the complex three-dimensional unsteady flow mechanism and matching characteristics between the rotating part of the supercharger and the reciprocating part of the cylinder piston

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  • A three-dimensional simulation method for the working process of a supercharged diesel engine
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  • A three-dimensional simulation method for the working process of a supercharged diesel engine

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Embodiment Construction

[0015] The present invention will be further elaborated below in conjunction with accompanying drawing:

[0016] A three-dimensional simulation method for the working process of a supercharged diesel engine, including the following processes such as figure 1 as shown,

[0017] First, establish a three-dimensional model of the supercharged diesel engine device in the CAD modeling software such as figure 2 As shown, including the turbocharger compressor, intake port, cylinder, exhaust port and turbocharger turbine; and the calculation grid of each part of the diesel engine is generated in the grid generation software;

[0018] Then use general-purpose commercial computational fluid dynamics software, such as ANSYS-Fluent, to establish the simulation model of the cylinder, the simulation model of the turbocharger compressor and supercharger turbine, and the simulation model of the intake port and exhaust port;

[0019] The parameters used to calculate the speed of the turbocha...

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Abstract

The invention provides a three-dimensional simulation method for the working process of a supercharged diesel engine, which is characterized in that on the basis of the three-dimensional simulation model of the process in the diesel engine cylinder, the three-dimensional models of the compressor and the turbine are added to simulate the transient operation and response characteristics of the supercharger. Calculate the instantaneous angular acceleration of the torque and moment of inertia borne by the rotating parts of the supercharger, and then obtain the speed of the supercharger rotor at different moments through time integration; the invention introduces a three-dimensional model of the supercharger to more realistically simulate the working process of the supercharged diesel engine The dynamic characteristics of each component in the engine can predict the response of the supercharger and help reveal the matching characteristics of the diesel engine.

Description

technical field [0001] The invention relates to the field of supercharged diesel engines, and relates to a design simulation technology of a supercharged diesel engine, in particular to a three-dimensional simulation method for the working process of a supercharged diesel engine. Background technique [0002] The working process of a supercharged diesel engine includes the rotating parts of the supercharger (including the compressor and the turbine) and the reciprocating parts of the cylinder of the diesel engine. These two parts involve two different working modes. The matching problem has always been in the design process of the supercharged diesel engine. important research content. The current general method is to use one-dimensional unsteady flow simulation technology for the working process in the cylinder of the diesel engine, and for the supercharger to use the supercharger characteristic curve derived from the test, and to perform supercharging through the principle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F30/17F02B37/00
CPCF02B37/00G06F30/17G06F30/20Y02T10/12
Inventor 王强王军毛虎平董小瑞
Owner ZHONGBEI UNIV
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