3D Numerical Simulations and Analysis of Double Pipe Heat Exchangers
Heat exchangers are extensively used in rocket power system for gas supply and distribution.Three-dimensional numerical simulations of two different heat exchangers through straight and curve tubes,respectively,are performed by commercial software FLEUNT.Comparisons are made between numerical and empirical results.The investigation indicates that the total heat transfer coefficient obtained by FLUENT using the flow-heat coupled algorithm agrees well with that from the empirical formula.Moreover,compared with heat exchanger through straight tubes,the centrifugal force exerted on the hot air in the heat exchanger through curve tubes leads to higher heat transfer efficiency.As a result,the total heat transfer coefficient of heat exchanger through curve tubes is approximately 10%greater than that through straight tubes given other flow and geometry factors fixed.
double pipe heat exchangers3D numerical simulationflow-heat coupled algorithm in FLUENTcentrifugal forcetotal heat transfer coefficient
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