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A Study of a Practical Numerical Analysis Method for Heat Flow Distribution in the Engine Compartment
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Abstract
The thermal environment in the automotive engine compartment is expected to become increasingly severe in the years ahead owing to the installation of a large-size manifold catalyst to reduce exhaust emissions, among other factors. This will make it even more important to analyze the engine compartment layout in terms of heat flow considerations at the design conceptualization stage of a new vehicle.
In this research, a flow analysis program called DRAG4D was applied to find the flow velocity distribution and ambient air temperature distribution in the engine compartment during driving, idling and after the engine was turned off. This original program developed at Nissan takes into account the effects of the energy balance and buoyancy, and provides a practical level of prediction accuracy.
The time required to create an analytical model and perform the computations has been shortened by using an automatic grid generation function, based on a solid model, and experimental equations. As a result,a numerical analysis method has been achieved that can be employed as a practical design tool.
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Citation
Minegishi, T., Uematsu, Y., Simonosono, H., and Yoshikawa, Y., "A Study of a Practical Numerical Analysis Method for Heat Flow Distribution in the Engine Compartment," SAE Technical Paper 931081, 1993, https://doi.org/10.4271/931081.Also In
References
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- Minegishi, T. Improved Simulation of Automotive Coolant Temperature Nissan Technical Review 22 63 68 1986
- Shimonosono The Optimization of Heat Flow Distribution in the Engine Compartment 1993
- Kuriyama, T. Visualization of the External Flow Around a Car Body and the Internal Flow Through its Engine Compartment Transactions of JSAE 882 1135 1988