重型卡车实车风洞试验结果修正

Correction of Wind Tunnel Test of a Heavy-Duty Truck

摘要:

重型卡车牵引车及载货状态属于“非连续体”（形体不连续），传统的修正方法不完全适用于该类形体的结果修正，因此建议使用道路试验和数值模拟相结合的方式进行深入研究。为此，介绍了重型卡车风洞试验的特点及某车型在加拿大NRC风洞的试验过程，基于试验报告的部分信息和闭式风洞标定方法对NRC风洞的修正方法进行推导，获得了修正公式。使用推导得到的修正公式对原始数据进行处理，结果与试验报告有较高吻合度，证明推导公式的有效性，因此可为闭式风洞进行重型卡车的空气动力学试验提供参考。

Abstract:

This paper introduces the characteristics and the process in NRC wind tunnel test of a heavy-duty truck in Canada. Based on some information in the test report and the calibration method for closed wind tunnels， the correction method of NRC wind tunnel is deduced and the correction formula is obtained. The original data are processed with the derived correction formula， and the results are in good agreement with the test report， which proves the validity of the derived formula， provides reference for the aerodynamic test of heavy trucks in the closed test section wind tunnel.