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RISS 인기검색어
- 검색키워드
- 저자 : Shahnaz Rezaee (검색결과 2 건)
- 무료
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Spray Uniformity Dependence on the Fuel Temperature from a Pressure Swirl Nozzle
Reza Alidoost Dafsari,Shahnaz Rezaee,Foad Vashahi,Jeekeun Lee 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12
The quality of spray in combustion application is often described with the droplet mean size and spatial distribution. Drop size distribution is a prime factor for Combustion efficiency. An experimental study was conducted to investigate the effect of fuel temperature and accordingly physical properties on the droplet size uniformity factor. A Dantec phase Doppler anemometry PDPA system was employed to measure droplet size and flow visualization was carried out using a particle image velocimetry PIV system. The result shows a major effect of fuel temperature on the spray structure, hydraulic behavior, and spatial droplet distribution. Multiple size distribution functions were compared to find the best representation. Rosin-Rammler distribution shows the best fit to the experimental result. The q value of the Rosin- Rammler distribution as the uniformity factor was found to increase exponentially with increasing the fuel temperature. This observation can potentially help the enhancement of drop size distribution prediction accuracy.
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Effect of Fuel Temperature on the Drop Size Distribution Function
Reza Alidoost Dafsari(레자알리두스트다프사리),Shahnaz Rezaee(샤나즈 레자이),Foad Vashahi(포아드 바샤이),Jeekeun Lee(이지근) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.8
The spray structure and drop size distribution issuing from industrial nozzles are important for their application. In gas turbine combustion the uniformity and spatial distribution of the swirl spray initiates the combustion efficiency and product control. This study investigates the effect of injection pressure and physical properties of a commercial jet fuel (JET-A1) in a wide range with controlling the fuel temperature on the spatial structure of the spray. Furthermore, multiple droplet distribution functions suggested in the literature were examined to find the best applicable fit. Spray structure and droplet size measurement were carried out by applying laser diagnostic methods namely phase Doppler anemometry and Mie-scattering imaging method. The results showed with increasing both injection pressure and the fuel temperature and accordingly the decreasing the fuel viscosity, surface tension and density, enhances spray cone angle and atomization quality. Both studied parameters decreased the breakup length and consequently spray mean droplet size while widened the spray cone angle. Moreover, an in-depth attempt was made to find the accordance of q value of Rosin-Rammler distribution function to fuel temperature.
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