Numerical simulation method for plate impact jet flow heat transfer problem

Abstract

The invention discloses a numerical simulation method for a plate impact jet flow heat transfer problem. The method comprises the following steps that: S1: establishing a calculation model, and according to experimental data, establishing a plate impact jet model which contains a thermal insulation impact face and a sealed plate; S2: carrying out grid division and grid independence verification onthe model; S3: setting a turbulence model, and selecting an SSTk-[Omega] model to be coupled with an intermittent transition model, a cross flow transition model and a Kato-Launder model; S4: according to a practical situation, setting a boundary condition and an initial value; S5: setting the solving way of ANSYS-FLUENT software; and S6: operating the ANSYS-FLUENT, obtaining the heat transfer distribution rule of the plate impact jet flow under different heights, and expressing the heat transfer rule by a dimensionless Nusselt number Nu. By use of the method, the influence of transition on the impact jet flow heat transfer is considered so as to better conform to the physical phenomenon of the impact jet flow heat transfer, and therefore, calculation accuracy is improved.

Description

technical field [0001] The invention relates to the field of fluid technology, in particular to a numerical simulation method for the problem of flat plate impact jet heat transfer. Background technique [0002] The phenomenon of impingement jet heat transfer is ubiquitous and widely used in civil and military fields. Because it has an extremely thin boundary layer in the stagnation zone, it can greatly improve the heat transfer efficiency, so it is widely used in drying of paper and textiles, cooling of gas turbine blades, rapid cooling of hypervelocity aircraft, and cooling of electronic components and wing deicing, etc. In the military field, the launch of unmanned aircraft, the launch of weapons, and the take-off of vertical take-off and landing aircraft are all closely related to the impact jet phenomenon. Accurate numerical simulation of the impinging jet phenomenon is of great significance for optimizing the design based on a deep understanding of the problem mechan...

AI Technical Summary

Problems solved by technology

Early numerical calculations of impinging jets found that the traditional model and the standard model cannot accurately predict the Nusselt number distribution on the impinging plate surface when calculating the plate impinging jet heat transfer problem

With the development of computer computing power, methods such as v2-f turbulence model, large eddy simulation turbulence model (LES), direct numerical simulation (DNS) and other methods have been widely used, but it is still difficult to obtain accurate nuceration in flat plate impingement jet flow. Algorithm distribution

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