Purpose

Using the computational fluid dynamics (CFD) technique, this paper aims to investigate the influence of key parameters such as throat diameter; the suction ratio on the flow field behaviors such as Mach number; pressure; and temperature.

Design/methodology/approach

To investigate the effect of throat diameter, it is simulated for 4, 6, 8 and 10 mm as throat diameters. The governing equations have been solved by standard code of Fluent Software together with a compressible 2 D symmetric and turbulence model with the standard k–ε model. First, the influence of the throat diameter is investigated by keeping the inlet mass flow constant.

Findings

The results show that a place of shock wave creation is changed by changing the throat diameter. The obtained results illustrate that the maximum amount of Mach number is dependent on the throat diameter. It is obtained from the results that for smaller throats higher Mach numbers can be obtained. Therefore, for mixing purposes smaller throats and for exhausting bigger throats seems to be appropriate.

Originality/value

The obtained numerical results are compared to the existing experimental ones which show good agreement.

中文翻译：

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喉管直径对射流和射流性能的影响的计算流体力学分析

目的

本文旨在利用计算流体动力学（CFD）技术研究关键参数（如喉管直径）的影响。吸力比对流场行为的影响，例如马赫数；压力; 和温度。

设计/方法/方法

为了研究喉咙直径的影响，将其模拟为4、6、8和10 mm作为喉咙直径。控制方程已通过Fluent Software的标准代码以及带有标准k–ε模型的可压缩2D对称和湍流模型一起求解。首先，通过保持入口质量流量恒定来研究喉部直径的影响。

发现

结果表明，通过改变喉部直径可以改变产生冲击波的位置。获得的结果表明，最大马赫数取决于喉道直径。从结果可以得出，对于较小的喉咙，可以获得较高的马赫数。因此，出于混合目的，较小的喉咙和排出较大的喉咙似乎是合适的。

创意/价值

将获得的数值结果与现有的实验结果进行比较，结果显示出良好的一致性。