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PIV를 이용한 스파이럴 노즐에서의 아음속 기체유동 계측
Abhilash Suryan,Vincent Lijo,김희동(Heuy-Dong Kim),김동선(Dong-Sun Kim) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
Swirling flow, in general, needs a compulsive force to get the tangential momentum in the nozzle. But the Spiral Nozzles do not require any extra device to generate this swirl. The special geometry of the nozzle facilitates a self generating mechanism for the spiral flow in the spiral nozzles. In the present investigation velocity measurements are carried out on the subsonic gas flow through Spiral Nozzles with different geometries for the annular slit using Particle Image Velocimetry technique. Velocity measurements were carried out at two sections in the spiral flow field and the flow characteristics were compared for the different nozzle configurations.
Abhilash Suryan,Dong-Sun Kim(김동선),Hae-Dong Lee(이해동),Joon-Kyeong Kwon(권준경),Heuy-Dong Kim(김희동) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
The ever increasing demand for power and the shortages encountered during summer calls for the implementation of strategies for power saving in industry. Inlet fogging of gas turbine engines is quite popular due to the ease of installation and the relatively low initial cost compared to other inlet cooling methods. In the present investigation, a detailed analysis is carried out on the basis of coincident wet bulb and dry bulb temperature data of a compressed air plant from April to October, 2007 to determine the evaporative cooling potential for the period. The power gain that can be obtained by employing inlet fogging of the air compressors is analyzed based on the real climatic data at several sites in Korea. An experimental set-up was constructed and tests were carried out with the standard impaction pin nozzle. The experimental results were found to match with the theoretical calculations.
GSV Measurements of Fog Sprays from Impaction Pin Nozzles
Abhilash Suryan,Jung Keun Lee(이중근),Chang Ki Kim(김창기),Dong Sun Kim(김동선),Heuy Dong Kim(김희동) 한국가시화정보학회 2010 한국가시화정보학회 학술발표대회 논문집 Vol.2010 No.11
Impaction pin nozzles are widely used in a large number of engineering applications. For inlet air cooling of turbo machines using fog sprays, it is essential to have prior knowledge of droplet size distribution in the spray. Present paper reports the experimental determination of droplet size distribution of the fog spray from an impaction pin nozzle. The measurements were carried out using global sizing velocimetry technique. Results obtained are in good agreement with available data.