本研究目的主要在於探討溫度與壓力感測塗料的特性，尋求改善傳統之表面溫度與壓力量測技術及建立風洞試驗上的技術。溫度與壓力量測為風洞試驗不可或缺的一個項目。對於模型表面靜壓量測而言，傳統方法是將表面壓力孔連接至壓力感測器量取平均壓力，或是將動態壓力感測器安裝在測試模型之表面量取壓力擾動，然而這些量測方法對比較複雜或尺寸較小之模型而言，均有空間解析度不足及量測不易的問題。量測模型表面的溫度亦有相同的問題， 傳統方法是埋設熱電偶
（Thermocouple）於模型表面中，利用溫度所造成的電壓差變化來量取表面溫度，但仍會受限於只能單點量測及模型尺寸形狀的限制。而溫度與壓力感測塗料是利用液晶分子與螢光抑制效應為基礎的量測技術，已經發展到能夠測量風洞模型表面溫度與壓力分佈情況。
本研究將著重於兩部分：（一）溫度與壓力感測塗料之特性研究及改良，並做定性與定量的分析。（二）應用感測塗料於穿音速風洞，建立完整量測設備及校驗能量，以便未來能應用於彈體模型表面溫度與壓力變化分佈之量測，進一步瞭解彈體表面空氣動力流場特性分析。
本研究成果將有助於建立國內在溫度與壓力感測塗料之發展，建立風洞測試之能量，並可推廣至其他相關之溫度與壓力量測。

The purpose of this study is to develop the measurement techniquesusing pressure sensitive paint (PSP) and liquid crystal for transonic wind
tunnel experiment. Acquiring temperature and pressure distribution of modelsurface is very important for studying the flow phenomena associated with theaerodynamic performance of the model. Traditional temperature and pressure
measurements are taken with temperature sensors and pressure taps embedded in the model surface. Temperature and pressure taps do not give good spatial resolution due to the need for individual sensors. If the shape of the model is
too small or complicated in geometry, it will limit the quantity of the sensors.Also, making a model can be very expensive if installation of a large amount of taps or sensors has to be considered. Using PSP and liquid crystal
techniques, one can acquire temperature and pressure distributions,respectively, with high spatial resolution and simple model preparation.
This research includes two parts. (1) Develop the PSP technique with the qualitative and quantitative analysis, and apply the technique in transonic wind tunnel experiment, with the aim to investigate the phenomena of flow
around an ogive body at angles of attack. (2) Apply the liquid crystal technique in the transonic wind tunnel experiments, for studying the surface patterns concerning a finite cylinder on a flat plate and an ogive body.
Attempts are made to reduce the temperature distributions from the obtained liquid crystal images.

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