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정욱희(Jung Ukhee),최영석(Choi Youngseok),이경용(Lee Kyoungyong),양상호(Yang Sangho),김경엽(Kim Gyeongyeop) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
This paper presents a numerical study on the nozzle design of air curtain in the tunnel. The purpose of the air curtain in tunnel is to block the fire smoke. The numerical study has been carried out to investigate the influence of discharge angle at air curtain and velocity at nozzle exit. Those are very important to the performance of the smoke prevention. In order to achieve an optimum design and to explain the interactions between the different geometric configurations in air curtain system, the three-dimensional computational fluid dynamics (CFD) and single factor design have been applied. At present, our attention is focused on the velocity distribution(flow width and flow position) of 1.5m on the ground in tunnel. Also, we analyzed the influence of draft in the tunnel. Detailed effects of discharge angle of air curtain and velocity at nozzle exit are discussed.
이경용(Lee Kyoung-Yong),정욱희(Jung Ukhee),최영석(Choi Youngseok) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
In this study, the platform technology to measure the flow rate was developed. The platform technology was included the design program of equipment and data acquisition. The measuring equipment was designed by single and multi nozzle type based on AMCA standards 210-99 and ISO 5167-3. In equipment design program, user can get the nozzle type, size, number and location. The measuring capacity and size of equipment was also designed by this program. The measurable flow quantity of each nozzle was calculated by the theory. The equipment design program for multi nozzle type was shown the total measurable flow rate data on the selected nozzles. The DAQ(data acquisition) system was made by NI DAQ kit. And the measurement and control program of the tester was set by LabVIEW. The program has the multi nozzle selection function and sensor setting function. The platform technology to measure the flow rate was verified by existing experimental result.