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Characterization of a Superheated Fuel Jet in a Crossflow

机译:横流中过热燃料射流的表征

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An experiment was conducted to characterize a superheated fuel jet (Jet-A) injected into an unheated crossflow of air. The liquid phase of the fuel jet was characterized with high speed imaging and phase Doppler interferometry. The transition from a shear-atomized to a flash-atomized spray at a fuel temperature of 513 K (465°F) was observed at an ambient pressure of 1 atm, which is consistent with the bubble and dew point curves predicted for JP-8. The explosive breakup that was seen in the flash-atomized spray produced submicron droplets with a high radial momentum. This unique behavior makes superheated fuels an attractive design feature for fuel preparation devices that can employ flash boiling to enhance fuel atomization and mixing in a compact volume.
机译:进行了一项实验,以表征注入到未加热的横流中的过热燃料射流(Jet-A)。通过高速成像和相位多普勒干涉仪对燃料射流的液相进行了表征。在1atm的环境压力下观察到在513 K(465°F)的燃料温度下从剪切雾化喷雾到闪蒸雾化喷雾的过渡,这与JP-8预测的气泡和露点曲线一致。在快速雾化喷雾中看到的爆炸性破裂产生了具有高径向动量的亚微米液滴。这种独特的性能使过热燃料成为燃料制备设备的引人注目的设计特征,该设备可以采用闪蒸来增强燃料的雾化和紧凑体积的混合。

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