本研究運用壓力螢光感測塗料(Pressure Sensitive Paint, PSP)量測可壓縮偏向凸角流之表面壓力分佈。壓力螢光感測塗料使用PtTFPP錯合物作為螢光分子，其壓力敏感度及溫度敏感度分別為0.65%/kPa ~ 0.70%/kPa以及−1.9%/°C ~ −2.1%/°C。塗料的反應速度為870微秒。進行實驗之模型凸角角度以及偏向角度分別為10⁰ ~ 17⁰以及5⁰ ~ 15⁰。進行穿音速風洞實驗之馬赫數為0.64以及0.83。對於無邊界層分離現象之次音速偏向凸角擴張流場來說，壓力螢光感測塗料與傳統壓力傳感器間的誤差小於2.7%，並且流場可視化無三維效應，呈現一近似二維分布模式。在有震波誘導邊界層分離之偏向凸角流中，位於鄰近邊界層分離之位置觀測到一震波彎曲的現象，並且擁有顯著的橫向壓力梯度。然而對於穿音速流場來說，PSP以及Kulite壓力傳感器之間的實驗數據有很大的誤差。我們使用絕熱壁面溫度以及參考壓力點進行校正的結果，雖能使PSP與Kulite壓力傳感器間的誤差降低，但位於分離泡內的數據經過修正後，誤差仍然不小。需要流場內全域的溫度分布數值，以修正壓力螢光感測塗料的結果，得到更為準確的實驗數據。

In this work, pressure sensitive paint (PSP) was used to measure the static pressure of a compressible swept convex-corner flow, and the surface pressure distributions could be determined. The self-developed PC-PSP, using PtTFPP as a luminophore, exhibited pressure sensitivity values ranging from 0.65%/kPa ~ 0.70%/kPa and temperature sensitivity ranging from −1.9%/°C ~ −2.1%/°C. The response time was approximately 0.87 ms. The free stream Mach number was 0.64 and 0.83. The convex-corner angle and swept angle were, respectively, 10⁰ ~ 17⁰ and 5⁰ ~ 15⁰. In the case of the subsonic expansion flow, the PSP data agreed with the experimental data measured using the Kulite pressure transducers, with deviations less than 2.7%. The flow patterns appeared to be 2D in nature. For the test cases exhibiting a shock-induced boundary layer separation, the spanwise pressure gradient was significant, and curved shocks were observed. However, the error between the proposed PSP and the Kulite pressure transducers was significant in terms of the transonic expansion flow. Correction of the PSP data using a reference pressure tap and adiabatic wall temperature reduced deviations between PSP and the Kulite pressure transducers, i.e., from 15.4% to 6.3% for η = 17° and λ = 15°. Nevertheless, the assumption of a constant recovery factor failed in the separation region, and a surface temperature distribution was required for temperature correction.

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