Method for calculating air intake volume of front-end module of car engine cabin

Abstract

The invention provides a time-saving and effort-saving method for calculating air intake volume of a front-end module of a car engine cabin. The instantaneous-condition air intake volume in a real car driving condition can be considered in an early design period. The method specifically comprises the steps of A, defining an air intake system of the front-end module of the engine cabin and dividing a front-end air intake channel of the whole engine cabin into a plurality of parts and paths according to flow characteristics; B, performing CFD flow field calculation on the engine cabin and calculating resistance of the parts and the paths of the air intake system of the front-end module of the engine cabin; C, defining resistance characteristics of the parts and the paths; D, establishing a balance calculation model of the air intake volume of the front-end module of the engine cabin by utilizing KULI software; E, determining an instantaneous condition of car running and inputting a defined complete car speed in the instantaneous condition into the calculation model in the step D; and F, reversely deriving the instantaneous-condition air intake volume of the front-end module according to the balance calculation model of the KULI software.

Description

technical field [0001] The invention relates to the technical field of automobile design, in particular to a method for calculating the air intake volume of a front-end module of an automobile engine compartment. Background technique [0002] When the car is running, the airflow around the body will generate aerodynamic force on the surface of the body. There is generally positive pressure at the air intake grille at the front end of the car, and under the action of aerodynamic force, air will flow into the engine compartment. When the car's cooling fan is working, it will suck the air at the air intake grille. Therefore, under the joint action of the aerodynamic force around the car body and the cooling fan, a large amount of air will enter the engine compartment from the front of the car through the air intake grille at the front of the car. Cooling air enters the interior of the engine compartment through the front air intake grille, flows through the air conditioner co...

AI Technical Summary

Problems solved by technology

The test method cannot be carried out in the early stage of design, and the corresponding work can only be carried out after the actual prototype vehicle is available, and the test cost is very high

The disadvantage of the second CFD simulation method is that it can only calculate the fixed steady-state conditions, and each calculation and analysis cycle is long and the workload is heavy.

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