Study on Optimization of Hydraulic Cutting Nozzle and Application

Hongqing Zhu; Wentao Liao; Kai Sheng; Bei-Fang Gu

doi:10.18311/jmmf/2017/27039

Jump To References Section

Authors

Hongqing Zhu
College of Resource and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100 083 ,CN
Wentao Liao
College of Resource and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100 083 ,CN
Kai Sheng
College of Resource and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100 083 ,CN
Bei-Fang Gu
North China University of Water Resources and Electric Power, Zhengzhou 450046 ,CN

DOI:

https://doi.org/10.18311/jmmf/2017/27039

Keywords:

Hydraulic Cutting, Water Jet Flow Field, Optimization of Nozzle Parameters, Mathematical Model, Gas Extraction.

Abstract

Based on the theory of hydrodynamics, a mathematical model of nozzle water jet flow field in hydraulic cutting is established. By numerical simulation for FLUENT software, the effects of nozzle convergence angle, nozzle outlet diameter and cylindrical section length on water jet flow impact is obtained and analyzed. At the same time, a mathematical model of the nozzle outlet velocity is deduced by the simulation results. Furthermore choose optimization of nozzle parameters in the field test, which its convergence angle is 13°, convergence segment length is 10 mm, cylindrical section length is 8 mm and nozzle outlet diameter is 2 mm. Application and testing in coal mine show that this nozzle has the best comprehensive effect in hydraulic cutting field test and improve gas extraction efficiency .