Numerical and Experimental Investigation on Heat Exchange Performance for Heat Dissipation Module for Construction Vehicles

Paper #:
  • 2017-01-0624

Published:
  • 2017-03-28
Abstract:
In this work, a XD132 Road Roller from XCMG in China was employed as the research basis to study the heat exchange performance for the heat dissipation module under varied working conditions. The module in XD132 consists of a cooling fan and a radiator group. At first, a numerical investigation on the elementary unit of the radiator was performed to obtain Colburn j factor and Fanning f factor, which was used for the -NTU method that predicts the radiator performance. The fan was numerically tested in a virtual tunnel to acquire the performance curve. The performance data from both investigations were transformed into the boundary conditions for the numerical model in a virtual tunnel. A field experiment was carried out to validate the simulation accuracy, and the performance regularity under four working conditions were discussed. The results shows that the simulation results of the radiator and fan could be applied to the vehicle simulation, and the turbulent airflow at the exit of the fan partly lowers the performance. Besides that, the elevated-temperature air flowing out of the fan is reheated by muffler and results in a working instability. The maximum error between simulation results and experimental data is less than 4%. The comparison between four working conditions also confirms that the heat exchange performance decreases as the vehicle moves forward at a increasing velocity and increases as the vehicle moves backward. The conclusions of this paper are of great significance in the resource and efficiency improvement on the vehicle design.
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