By means of a double mirror interferometry a two-dimensional temperature distribution measurement in convective thermal boundary layers is presented. When the cold air flows along a hot plate model, the interferometri...By means of a double mirror interferometry a two-dimensional temperature distribution measurement in convective thermal boundary layers is presented. When the cold air flows along a hot plate model, the interferometric fringe inside the boundary layer will bend. According to the displacement of the fringe and the relation between temperature and index of refraction, a two-dimensional temperature profile is obtained. All is accomplished by optical device with the help of micro-computer without any contact with the flow field.展开更多
The stable laminar flow established by an air stream sucked through a heated tube acts as an optically thin tens with variable focal length depending on the dimensions of the tube,tube-temperature and flow velocity.
A device for high-speed framing interferography for diagnosing transient phenomena in transparent media has been successfully construeted through research and development in the Institute of Mechanics, Academia Sinica...A device for high-speed framing interferography for diagnosing transient phenomena in transparent media has been successfully construeted through research and development in the Institute of Mechanics, Academia Sinica. It consists of a pulsed He-Ne laser source, an interferometer with simple shock-proof structure and a high-speed camera. Since the device is sample in structure and highly shock-proof, the interferograms obtained are vividly clear. Its perfor-展开更多
文摘By means of a double mirror interferometry a two-dimensional temperature distribution measurement in convective thermal boundary layers is presented. When the cold air flows along a hot plate model, the interferometric fringe inside the boundary layer will bend. According to the displacement of the fringe and the relation between temperature and index of refraction, a two-dimensional temperature profile is obtained. All is accomplished by optical device with the help of micro-computer without any contact with the flow field.
文摘The stable laminar flow established by an air stream sucked through a heated tube acts as an optically thin tens with variable focal length depending on the dimensions of the tube,tube-temperature and flow velocity.
文摘A device for high-speed framing interferography for diagnosing transient phenomena in transparent media has been successfully construeted through research and development in the Institute of Mechanics, Academia Sinica. It consists of a pulsed He-Ne laser source, an interferometer with simple shock-proof structure and a high-speed camera. Since the device is sample in structure and highly shock-proof, the interferograms obtained are vividly clear. Its perfor-
