| Under-hood is a semi-enclosed space, high requirements on the temperature. one hand the cabin of various materials such as rubber parts, wiring harness on temperature has certain requirements; On the other hand the engine itself requires proper heat dissipation, to ensure that it has the optimal power and economy under the various conditions. The number of components in under-hood is large , and various shapes, it is difficult to use the simple formula for processing. Application of CFD software can save a lot of development cost, and shorten cycle time.This paper is based on the new trucks for the development of Jiangling Motors Corporation. By means of POWERFLOW software for engine cooling characteristics and flow simulation and analysis are carried out, and applied to the actual project development. Main content:1) a benchmark cooling module structure parameters and performance analysis, attribute the target, a benchmark model analysis, parts of benchmark test and properties of the target decomposition;2) cooling module matching analysis: a combination of traditional theoretical calculation, benchmarking and layout analysis, determine the cooling module parts dimensions and performance;3) POWERFLOW parameter setting and application in Engineering : Engineering development objectives, related conditions and constraints into boundary conditions for input and output analysis, making the analysis and judgments;4) velocity field, pressure field, temperature field analysis of evaluation models in the baseline conditions ( ambient temperature of 45 degrees, 2 gear, 29kph, power point ), the Under-hood temperature field flow field characteristics and performance, the optimized solutions to meet the project objectives;5) the simulation results compared with experiment results : Based on the CFD simulation ,finished parts development, through a large number of bench and vehicle environmental experiments, experiments prove that the simulation results and the experimental results of conformity... |
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