Fluid Dynamics Simulation of High Speed Jet under Distinct Initial Input Velocities

Jie Gong,Qiang Zhang,Jihua Li,Wen Xia,Yanyun Lin,Fan Zhang

doi:10.4236/wjet.2018.63b001

Abstract

The aim of this study is to execute the fluid dynamics simulation of high speed jet under distinct input velocities (i.e., 114.1, 142.4, 165.6, 186.2 and 286.9 m/s). In particular, this study focuses on the impact velocity and velocity of two-phase flow (gas-liquid). Firstly, the three-dimensional geometric model of high speed jet is established on the basis of the actual operational conditions. Next, the unstructured grids of high speed jet are generated by means of ANSYS Fluent. Finally, the fluid dynamics simulation of high speed jet is implemented by using Fluent. The simulation results show that when the input velocity of the liquid increases, the impact velocity declines sharply, while according to the Bonuli law of conservation of energy, the impact effect on the device shows exponential growth with increasing input velocity. In addition, the relationship between the impact velocity and the input velocity and the relationship between the impact effect on the device and the input velocity are achieved, which could provide certain theoretical guidance for predicting the working pressure and velocity of high speed jet based on real input velocity.

Highlights

The aim of this study is to execute the fluid dynamics simulation of high speed jet under distinct input velocities (i.e., 114.1, 142.4, 165.6, 186.2 and 286.9 m/s)
The simulation results show that when the input velocity of the liquid increases, the impact velocity declines sharply, while according to the Bonuli law of conservation of energy, the impact effect on the device shows exponential growth with increasing input velocity
The relationship between the impact velocity and the input velocity and the relationship between the impact effect on the device and the input velocity are achieved, which could provide certain theoretical guidance for predicting the working pressure and velocity of high speed jet based on real input velocity

Summary

Introduction

The aim of this study is to execute the fluid dynamics simulation of high speed jet under distinct input velocities (i.e., 114.1, 142.4, 165.6, 186.2 and 286.9 m/s). High speed jet is a novel device, which uses water to generate powerful pressure and high speed It is widely used in many aspects, including agricultural machinery, industrial machinery and construction machinery, it is rarely used in food processing. As the ANSYS Fluent is widely used in numerical simulation, especially in the field of fluid, heat transfer chemical reaction and engineering, it is used to simulate the reaction of the model under different input velocities in this study [7] [9]-[14]. In this study, the unstructured grids of the geometric model are generated by means of ANSYS Fluent

Objectives

Results

Conclusion