Oleg Zhornik, Ihor Kravchenko, Mykhailo Mitrakhovych, Ekaterina Balalaieva
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摘要

在制造现代飞机时,采用动力装置与飞机的最佳整合原则,以确保由其功能目的决定的最大目标功能。动力装置的比油耗和比推力在很大程度上取决于进气装置内总气压的损失,其特征是总回收系数。压力沿丙烷直径方向的变化影响电厂进气效率。当使用进气口环装置时,由于丙烷叶片根部区域压力较低,其效率降低。斗式进气口的使用允许空气从靠近叶片高度中部的区域供应到通道中,这是影响送风通道中压力损失减少的主要因素。当采用桶形进气道时,曲率和收缩是影响s型通道有效性的重要因素。研究了s形通道在一定变窄条件下曲率对总压恢复系数的影响。所研究的s形通道在几何参数上相当于某电厂涡扇发动机环形进气道的通道。利用Florian Menter双层湍流模型(SST Transitional No. 4 Gamma Theta)和通道入口、通道本身六面体、出口四面体的组合有限元模型求解Navier-Stokes方程,从s形通道各段的流动参数计算s形通道的总压恢复系数。分析s形通道的总压恢复系数与M数和通道曲率的关系表明,在曲率为0.002以内,总压恢复系数不受显著影响。通道曲率的进一步增大对总压恢复系数的变化有显著影响,这与流动分离和涡形成的损失有关。
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Аналіз впливу кривизни S-подібного каналу та умов польоту на ефективність ковшового вхідного пристрою
When creating a modern aircraft, the principle of optimal integration of the power plant and the aircraft is used to ensure the maximum target function, determined by its functional purpose. The specific fuel consumption and specific thrust of the power plant depend significantly on the loss of the total air pressure in the inlet device, which is characterized by the total recovery factor. The change in pressure along the diameter of the propfan affects the efficiency of the inlet of the power plant. When using the inlet ring device, its efficiency decreases, due to low pressure in the area of the root part of the propfan blades. The use of a bucket inlet allows air to be supplied to the channel from the area located near the middle part of the blade height and this is the main factor influencing the reduction of pressure losses in the air supply channel. When using a bucket inlet, curvature and constriction are important factors influencing the effectiveness of S-channels. The influence of the curvature of the S-shaped channel on the total pressure recovery coefficient at a constant value of its narrowing is studied in this work. The study S-shaped channel in its geometric parameters is equivalent to the channel of the annular inlet device of a power plant with a turbofan engine. The total pressure recovery coefficient of an S-shaped channel is calculated from the flow parameters in the sections of the S-shaped channel by solving the Navier-Stokes equations using the Florian Menter two-layer turbulence model (SST Transitional No. 4 Gamma Theta) and the combined finite element model at the entrance to the channel and in the channel itself - hexahedral, at the exit tetrahedral. An analysis of the dependence of the total pressure recovery coefficient of the S-shaped channel on the M number and the channel curvature shows that, up to a curvature of 0.002, the total pressure recovery coefficient is not significantly affected. A further increase in the channel curvature has a significant effect on the change in the total pressure recovery coefficient, which is associated with flow separation and losses from the vortex formation.
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