• 제목/요약/키워드: Pressure Sensitive Paint

검색결과 31건 처리시간 0.026초

PSP 압력측정 시스템의 구축 (Construction of the Pressure Sensitive Paint System)

  • 전영진;김기수;서형석;변영환;이재우
    • 한국추진공학회지
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    • 제12권1호
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    • pp.7-15
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    • 2008
  • Pressure Sensitive Paint(PSP)는 압력에 반응하는 도료를 뜻한다. PSP를 이용하여 압력을 측정하기 위해서는 Paint Calibration과 PSP를 도포한 모델의 풍동실험이 필요하다. PSP는 이 두 가지의 결과를 이용한 이미지의 후처리과정을 통하여 압력정보를 포함한 이미지를 얻을 수 있는 신기술이다. 본 연구에서는 PSP에 필요한 장치 및 설비들을 구성하고 PSP를 이용하여 초음속 유동장 내의 압력측정 실험을 실시하였다. 압력측정 실험은 초음속 유동장의 노즐 벽면의 압력을 측정하였으며, 측정 압력에 대해서는 압력공(Pressure Tap)에 의한 결과값과 전산해석의 결과값을 통하여 비교하였고, 그 실험 결과를 바탕으로 PSP는 표면압력을 측정함에 있어서 압력공을 이용한 기존의 방식을 대체할 수 있는 기술임을 확인하였다.

표면압력 분포 가시화를 위한 압력감응 페인트의 제작 (Fabrication of Pressure Sensitive Paint for Visualizing Surface Pressure Distribution)

  • 안최란;기효진;진병규;김정균;김석범;조용화;노영철;최용덕;곽재수;최용규
    • 항공우주시스템공학회지
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    • 제2권3호
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    • pp.19-23
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    • 2008
  • We have fabricated pressure sensitive paint films consisting of PtTFPP activators dispersed in fluorinated polymer matrix. This matrix material is unique in its composition and structure. We evaluated the oxygen quenching effects, and thus the pressure sensitivity, of the fabricated films in terms of various processing parameters. Based on the experimental results, we anticipate that a good but new pressure sensitive paint would be presented through further elaboration of the polymer compositions and optimization of the processing conditions.

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PSP 압력측정을 위한 상관법에 의한 이미지 등록 (Correlation-Based Image Registration for Pressure Measurements Using Pressure-Sensitive Paint)

  • 박상현;성형진
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2004년도 춘계학술대회
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    • pp.1778-1782
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    • 2004
  • A new algorithm, CBIR (Correlation-Based Image Registration) was proposed to improve the resolution of image registration for PSP (Pressure-Sensitive Paint). The local displacement vectors were obtained by finding the displacement which maximizes the cross-correlation between two interrogation windows of 'wind-off' and 'wind-on' images. A recursive multigrid processing was employed to increase the non-linear spatial resolutions. The variations of image were precisely measured without identifying the control points.

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Measurement of the Film Cooling Effectiveness on a Flat Plate using Pressure Sensitive Paint

  • Park, S.D.;Lee, K.S.;Kwak, J.S.;Cha, B.J.
    • 한국추진공학회:학술대회논문집
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    • 한국추진공학회 2008년 영문 학술대회
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    • pp.53-58
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    • 2008
  • Film cooling effectiveness on a flat plate was measured with pressure sensitive paint. The pressure sensitive paint(PSP) changes the intensity of its emissive light with pressure and the characteristic was used in film cooling effectiveness measurement. The film coolants were air and nitrogen, and by comparing the intensity of PSP coated surface with each coolant, the film cooling effectiveness was calculated. Three blowing ratio of 0.5, 1, and 2 were tested with two mainstream turbulence intensities. Results clearly showed the effect of blowing ratio and mainstream turbulence intensity. As the blowing ratio increases, the film cooling effectiveness was decreased near the film cooling holes. However, the film cooling effectiveness far downstream from the injection hole was higher for higher blowing ratio. As the mainstream turbulence intensity increased, the film cooling effectiveness was decreased at far downstream from the injection hole.

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PSP를 이용한 압력측정에서의 상관법에 의한 이미지 등록 (Correlation Based Image Registration for Pressure Sensitive Paint)

  • 박상현;성형진
    • 한국가시화정보학회:학술대회논문집
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    • 한국가시화정보학회 2003년도 추계학술대회 논문집
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    • pp.63-66
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    • 2003
  • A new algorithm, CBIR (Correlation Based Image Registration) was proposed to improve the resolution of image registration for PSP (Pressure Sensitive Paint). The local displacement vectors were obtained by finding the displacement which maximizes the cross-correlation between two interrogation windows of 'wind-off' and 'wind-on' images. A recursive multigrid processing was employed to increase the non-linear spatial resolutions. The variations of image were precisely measured without identifying the control points.

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PSP 압력 측정 Calibration 시스템 구축 및 적용 (Application and Construction of PSP Calibration System)

  • 전영진;서형석;변영환;이재우
    • 한국추진공학회:학술대회논문집
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    • 한국추진공학회 2007년도 제29회 추계학술대회논문집
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    • pp.99-102
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    • 2007
  • Pressure Sensitive Paint(PSP)는 압력에 반응하는 도료를 뜻한다. PSP를 이용하여 압력을 측정 하기 위해서는 paint calibration과 PSP를 도포한 모델의 풍동실험이 필요하다. PSP는 이 두 가지의 결과를 이용한 이미지의 후처리과정을 통하여 압력정보를 포함한 이미지를 얻을 수 있는 신기술이다. 본 연구에서는 PSP에 필요한 장치 및 설비들을 구성하고 PSP를 이용하여 calibration 실험을 실시하였다. 본 연구를 통해 얻어진 calibration chamber의 설계 및 제작 방법으로 진보된 calibration 시스템을 연구할 수 있는 능력을 배양하였다.

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Pressure Sensitive Paint를 이용한 압력장 측정기술의 이미지 등록에 관한 연구 (Assessment of Image Registration for Pressure-Sensitive Paint)

  • 장영기;박상현;성형진
    • 대한기계학회논문집B
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    • 제28권3호
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    • pp.271-280
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    • 2004
  • Assessment of image registration for Pressure Sensitive Paint (PSP) was performed. A 16 bit camera and LED lamp were used with Uni-FIB paint (ISSI). Because of model displacement and deformation at 'wind-on' condition, a large error of the intensity ratio was induced between 'wind-on' and' wind-off images. To correct the error, many kinds of image registrations were tested. At first, control points were marked on the model surface to find the coefficients of polynomial transform functions between the 'wind-off' 'wind-on' images. The 2nd-order polynomial function was sufficient for representing the model displacement and deformation. An automatic detection scheme was introduced to find the exact coordinates of the control points. The present automatic detection algorithm showed more accurate and user-friendly than the manual detection algorithm. Since the coordinates of transformed pixel were not integer, five interpolation methods were applied to get the exact pixel intensity after transforming the 'wind-on' image. Among these methods, the cubic convolution interpolation scheme gave the best result.

Unsteady Pressure Measurement of Fan Stator Vane Using Pressure Sensitive Paint

  • Sakamoto, Kazuyuki;Tsuchiya, Naoki;Yamamoto, Masahiko;Hamano, Yasunori;Fujii, Kozo
    • 한국추진공학회:학술대회논문집
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    • 한국추진공학회 2004년도 제22회 춘계학술대회논문집
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    • pp.789-794
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    • 2004
  • The pressure sensitive paint (PSP) technique has been well established in external flow field. However, there are still unresolved issues in internal flow field. This work was focused on the application to unsteady pressure measurement of fan flow field. The PSP measurement system was established and the image processing software was developed. First, the performance of PSP was investigated at the static cell. Then the unsteady PSP measurement was carried out at fan test facility. PSP data images were acquired from the suction and pressure surface of stator vanes. Pressure distributions on the surface of the stator vane were detected non-intrusively. The issues of image acquisition and image processing were clarified through the practical PSP application to fan flow field.

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저속 유동용 Pressure Sensitive Paint 기술개발과 응용 (Development of Pressure Sensitive Paint (PSP) Technique for Low-speed Flows and Its Application)

  • 강종훈;이상준
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2003년도 추계학술대회
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    • pp.688-693
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    • 2003
  • The PSP technique has been used to measure pressure distribution on a model surface quantitatively. The objective of this study is to develop PSP technique which can be applied to low-speed flows. Four different PSP formulations including two porphyrins (PtOEP and PtTFPP) and two polymers (Poly(TMSP) and RTV-118) were tested and the performance of each combination was checked. In the static calibration, the luminescent intensity of the PSP coatings was measured from 0kPa to 11kPa with 0.5, 1, 2kPa increments. Among 4 PSP formulations tested, the combination of PtOEP and RTV-118 shows the best performance. The PSP technique was applied to an oblique impinging jet to measure the pressure field distribution on the impinging plate.

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PSP를 이용한 노즐벽면의 압력해석 (Pressure Analysis on the nozzle wall with PSP)

  • 김기수;배영우;이재우;변영환
    • 한국추진공학회:학술대회논문집
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    • 한국추진공학회 2005년도 제24회 춘계학술대회논문집
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    • pp.409-412
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    • 2005
  • 본 논문에서는 Pressure Sensitive Paint(이하 PSP)를 이용한 M=2.5 초음속 풍동의 노즐 벽면 압력 측정 과정을 보여주고, NASA Lewis Research Center에서 유사한 조건에서 수행한 실험결과와 비교하였다.

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