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以往,高速流中物体表面热流的测量主要采用1.薄膜热流计法;2.热量计法;3.利用物体内部的定常温度梯度法;4.利用色变和相变涂料法。后三种方法的空间分辨率和响应特性差。第一种方法虽具有空间分辨率高和响应快的优点,但不适用于像超高速风洞那样的气流持续时间短的风洞。为了解决上述热流测量问题,日本九洲大学航空工程系研制一种既能用于低速风洞又能用于超音速风洞,具有高的空间分辨率和高速响应特性的新型薄膜热流传感器。它的结构是在黄铜柱体表面上形成的约10微米厚的一氧化硅热电阻膜,再用真空蒸镀法在电阻膜上下表面
In the past, high-speed flow in the body surface heat flow measurement mainly used 1. Thin film heat flow meter method; 2. Calorimeter; 3. The use of objects within the constant temperature gradient method; 4. The use of color change and phase change coating method. The latter three methods have poor spatial resolution and response characteristics. Although the first method has the advantages of high spatial resolution and fast response, it does not apply to wind tunnels with short duration of airflow such as those in a super-speed wind tunnel. In order to solve the problem of heat flow measurement mentioned above, the Aeronautical Engineering Department of Jiuzhou University in Japan developed a new type of thin-film heat flow sensor with high spatial resolution and high-speed response, which can be used for both low-speed and supersonic wind tunnels. Its structure is formed on the surface of the brass cylinder about 10 microns thick silicon oxide thermal resistance film, and then vacuum deposition method in the upper and lower surface of the resistive film