摘要
提出了一种圆角矩形喷管的设计方法,并通过数值模拟软件对圆角矩形、椭圆、矩形以及轴对称喷管流场进行了对比分析。数值计算表明:在相同的入口条件和出口面积条件下,圆角矩形喷管和椭圆喷管均可获得较大的总温总压均匀区,马赫数略高于矩形喷管,均能提高设备能量利用率,但圆角矩形喷管结合了轴对称喷管和矩形喷管的优势,可获得更好的试验均匀区,边角处温度和压力梯度较小。圆角矩形喷管较大的侧壁平面也为氧化烧蚀试验中平板材料的固定提供了一定的便捷性。
A new design method of supersonic nozzle is proposed in this paper. The contrastive analysis between nozzles with different cross sections has been done at the same time through numerical simulation software. Numerical calculation shows that rounded rectangle nozzle and elliptical nozzle can obtain larger evenly area of total pressure and total temperature under the condition of the same entry condition and export area. Mach number is also slightly higher than that of rectangular nozzle. In this way, the utilization ratio of equipment energy is raised. Especially, the rounded rectangle nozzle can obtain better testing area, and the gradient of temperature and pressure in the corners is lower because of combining the advantage of axisymmetric and rectangular nozzle. The larger wall surface of rounded rectangle nozzle can also provides a certain convenience for the fixation of plate material in experiment of oxidation and ablation.
出处
《工业加热》
CAS
2016年第4期53-56,共4页
Industrial Heating
基金
国家重大科学仪器设备开发专项(2011YQ14014505)
国家自然科学基金重点项目资助(51334001)
关键词
平板材料
氧化
烧蚀
喷管
数值模拟
plate material
oxidation
ablation
nozzle
numerical simulation
