Numerical study of the gas flow in nozzles and supersonic jets for different values of specific heats
Numerical study of the gas flow in nozzles and supersonic jets for different values of specific heats
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DOI：
10.1088/1742-6596/653/1/012068
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发表时间：
2015-11
期刊：
影响因子：
--
通讯作者：
L. Gvozdeva;A. Chulyunin
中科院分区：
文献类型：
--
作者：
L. Gvozdeva;A. Chulyunin
在数值模拟的基础上，采用等压比热与等容比热之比(γ=cp/cv)和不同参数(喷管压比)，对平板锥形喷管发射超音速射流的过程进行了研究。NPR参数表示喷嘴入口处的压力与环境中的压力之比。因此，建立了固体网格模型，用于喷嘴内气体流动和喷嘴压缩气体射流形成的数值模拟，可用于分析数据结构。对于相同的参数npr，但在较小的γ值时，交点将进一步远离喷嘴的进口部分。流动分离变得很小。
The process of the issuing of a supersonic jet from a flat tapered nozzle has been investigated with two values of ratio of isobaric to isochoric specific heats (γ = cp/cV) and different parameters NPR (nozzle pressure ratio) on the basis of numerical modeling. NPR parameter represents the ratio of the pressure at the nozzle inlet to the pressure in the environment. As a result the solid state grid model have been created for the numerical simulations of the flow of gas inside the nozzle and jet formation of compressed gas from the nozzle, which can be used to analyze the data structure. For the same value of the parameter NPR, but at a smaller value of γ an intersection point shifts further away from the inlet section of the nozzle. The flow separation becomes substantially less.