热线风速计和其它接触式测量方法比较,具有探针对流场干扰小,空时分辨力高,频响快等优点。它和激光风速计(非接触式)一起,已成为当前研究流动微观机理的主要测试技术。但它的应用范围却受测试环境洁净度的限制。当然,热线应尽量用于洁净的环境,但在某些场合很难保证流场中没有轻微的污染,这就引入了热线测量的污染误差——利用热线预校 Hotline anemometer and other contact measurement methods compared with the probe flow field interference, space-time high resolution, fast frequency response and so on. Together with the laser anemometer (non-contact), it has become the primary test technique for studying flow micro-mechanisms. However, its scope of application is limited by the cleanliness of the test environment. Of course, the hotline should be used in a clean environment as far as possible, but in some cases it is difficult to ensure that there is no slight pollution in the flow field. This introduces a pollution error in hotline measurement -