北京机电工程研究所,北京,100074
张翔(1989-), 男, 陕西人, 工程师, 硕士研究生, 研究方向:飞行器气动设计.E-mail:zx906@126.com
何海波(1976-), 男, 黑龙江人, 研究员, 硕士研究生, 研究方向:飞行器气动设计.E-mail:hehaibo@163.com
纸质出版:2019
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张翔, 曹德一, 何海波, 崔飞. 飞翼布局无人机喷流对气动特性影响研究[J]. 空气动力学学报, 2019, 37(4): 578-585.
ZHANG Xiang, CAO Deyi, HE Haibo, et al. Influence investigation of engine exhaust on aerodynamic performance for the flying wing UAV[J]. 2019, 37(4): 578-585.
张翔, 曹德一, 何海波, 崔飞. 飞翼布局无人机喷流对气动特性影响研究[J]. 空气动力学学报, 2019, 37(4): 578-585. DOI: 10.7638/kqdlxxb-2017.0052.
ZHANG Xiang, CAO Deyi, HE Haibo, et al. Influence investigation of engine exhaust on aerodynamic performance for the flying wing UAV[J]. 2019, 37(4): 578-585. DOI: 10.7638/kqdlxxb-2017.0052.
采用计算流体力学方法,针对飞翼布局无人机涡扇发动机喷流问题开展了数值模拟研究。首先,应用Reynolds平均Navier-Stokes方程数值模拟方法,对典型飞翼布局无人机数值模拟进行了网格无关性验证;其次,探讨了在工程设计中,由于喷流导致无人机产生的外形变化带来的气动特性差异;最后,针对典型工况下不同落压比喷流条件,研究分析了涡扇发动机喷流效应对无人机气动特性的影响规律。研究结果表明:喷流导致飞翼布局无人机外形发生变化,因此带来6%~9%阻力系数的增量,并使俯仰力矩系数下移;而喷流效应主要影响无人机阻力系数和俯仰力矩系数,影响规律随落压比而变化。
The turbofan engine exhaust simulation is carries out for the flying wing UAV by the means of computational fluid dynamics. Firstly
the grid convergence study is performed with course
medium
and fine grid systems for the flying wing UAV through Reynolds-averaged Navier-Stokes equations and structured grid technology. Secondly
the change of the aerodynamic performance caused by the difference between the flying wing configuration with engine exhaust and without engine exhaust is discussed in the engineering design. Lastly
the turbofan engine exhaust effect is studied with three different nozzle pressure ratio conditions. The study shows that
the change of the configuration generated by engine exhaust makes the drag increased 6%-9% and pitching moment decreases. The engine exhaust has an effect on drag coefficient and pitching moment coefficient
and the influence quantities are varied with the nozzle pressure ratio.
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