Research of Resonator-sound-generator Atomizing Nozzle

喷嘴技术的应用范围几乎包含所有工业领域、农业生产、交通运输以及人们的日常生活。作为必备组件在燃烧装置上的应用尤为重要。以往对于新型的流体动力式超声波雾化喷嘴研究表明：这类喷嘴的雾化粒径小（小于50μm）且分布均匀性好，对实现低氧燃烧、减少烟气中烟尘和氮氧污染物的排放有实质性的意义。因此本文以谐振腔式声能雾化喷嘴为研究对象，通过设计结构，利用FLUENT软件对其流场、声场以及雾化性能进行多参数的数值模拟，通过雾化性能的变化规律分析了其雾化机理。 研究首先基于哈特曼发声哨的原理设计了谐振腔式声能雾化喷嘴。通过对喷嘴高速射流流场和声场模拟，分析了谐振腔式声能雾化喷嘴的流场特性和发声机理。计算结果表...The applications of nozzle technology almost include all the industrial sectors, transportation, agricultural production and people's daily lives. Among which the application to combustion devices is particularly important .The previous studies on the new hydrodynamic ultrasonic atomizing nozzle have shown that: the nozzle decrease the particle size(smaller than 50μm) and meliorate the distributio...学位：工学硕士院系专业：物理与机电工程学院_航空宇航推进理论与工程学号：3202012115269

高超声速飞行器一体化设计的新选择——缩颚进气道

介绍了一种应用于高超声速飞行器的新型三维内乘波进气道,即缩颚进气道(JAWS InlET)的国外研究进展。对比基准进气道设计,分析了这种进气道的设计方法、流场特征和性能特点。国外研究结果表明,这种进气道通过四道激波面的设计,改善了激波/边界层以及激波/激波的相互作用,提高了进气捕获量,减少了溢流损失,有效地提高了推阻比。因此,可望通过对缩颚进气道的进一步研究,使其成为高超声速飞行器一体化设计的新选择

Performance Analysis of Three Kinds of Aero-Engine with Inter-Stage Turbine Burner

为探究级间燃烧室对各种航空发动机的性能影响,利用热力循环原理分别计算了在有无级间燃烧室的情况下涡喷、涡扇和涡轴发动机的性能结果并与实际型号做出对比。通过计算获得了上述三种发动机在加入级间燃烧室后的单位推力和耗油率随飞行马赫数等参数在一定范围内变化的曲线。结果表明加入级间燃烧室后对各种发动机的动力性能提升都在10%以上,个别涡轴发动机可达30%。同时若能将加入级间燃烧室后增加的质量控制在一定范围内,则对于各型发动机均可提高其推重比。In order to investigate the effects of the inter-stage turbine burner( ITB) on aero-engines,the thermodynamic cycle analysis was performed to demonstrate the performance of three kinds of aero-engines with the inter-stage turbine burners.The performance curves for different flight and operation conditions were obtained by calculation.Results show that specific thrust can be improved by at least 10%,and for one turboshaft engine the specific thrust even can be improved by 30%.Based on comparison between the real aero-engine performance and the calculation results,the errors are acceptable and the thrust-weight ratios show the potential capability of ITB application.国家自然科学基金(11002125;51106131); 中央高校基本科研业务费专项资金(2013121019