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本文介绍了一种使用萤光微丝来观察物体表面流谱的新方法。这种方法不仅适用于低速风洞中实时观察流谱,或用照相方法记录流谱,并且也适用于跨、超音速风洞中观察或记录流谱。实验证明,由于萤光微丝的尺度极小(直径仅为10～20微米左右),风洞试验模型粘贴萤光微丝后,对测力试验的结果影响不大,在实验误差范围之内。故建议在风洞试验模型加工完毕时,即粘贴萤光微丝,以便随时观察流谱,并进行测力试验。 我们在低速风洞中,进行了六种平面形状机翼的萤光微丝法流谱观察,并就其中几种平面形状机翼与资料中的油流流谱进行了比较。
This article describes a new method for using fluorite filaments to visualize the fluid profile of an object. This method is not only suitable for real-time observation of fluid spectra in low-speed wind tunnels, or for recording fluid spectra by photographic methods, but also for the observation and recording of fluid spectra in cross-supersonic wind tunnels. Experiments show that since the scale of fluorescent microfilaments is extremely small (the diameter is only about 10 to 20 microns), the wind tunnel test model has little effect on the results of the force test after the fluorescent microfilament is pasted, and within the experimental error range . Therefore, it is suggested that when the wind tunnel test model is processed, the fluorescent microfilament is pasted so as to observe the flow spectrum at any time and carry out the force-measuring test. In the low-speed wind tunnel, we observed the microfluidic microfluidic spectra of six kinds of plane-shaped wings and compared the oil flow profiles in several plane-shaped wings with those in the data.