CFDによるディーゼル機関燃焼室壁の熱伝達の解析

概要

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Computational fluid-dynamic predictions are presented for heat fluxes to diesel combustion chamber walls. The computer code, previously developed by the authors, simulated a three-dimensional combustion field using a modified gas-jet model for fuel sprays, a standard k-ε model for turbulence and a combined eddy-break-up/one-step-reaction model for heat release. A thin deposit layer covering the combustion chamber walls was taken into account for modeling the boundary condition at the walls and integrated in the law of the wall with a quasi-steady assumption. The computed heat flux shows a satisfactory result with a reasonable thickness of the deposit, compared with that obtained from the empirical correlations by Woschni, while the computed result for bare metal walls is almost twice as large as the empirical value.
一般社団法人日本機械学会の論文
1991-02-25