Numerical simulation of heat transfer between low pressure pipeline of pre-mixed abrasive water jet system and low temperature environment

DOI

10.2991/icmse-18.2018.113How to use a DOI?

Keywords

numerical simulation, low pressure pipeline, pre-mixed abrasive water jet, low temperature environment

Abstract

The physical model of low pressure pipeline of pre-mixed abrasive water jet system is established. Based on the software of FLUENT, the numerical simulation of heat transfer between low pressure pipeline of pre-mixed abrasive water jet system and low temperature environment was carried out through solving the continuity equation, momentum equation and energy equation. And the method of determining the maximum length of low pressure pipeline of pre-mixed abrasive water jet system suitable for low temperature environment was confirmed. The simulation results show that: (1) the water temperature decreases along the axial direction with the increase of axial distance at different radial distances, and their descent rates are identical; (2) At different axial distances, the temperature of the material, namely water or pipeline changes along the radial direction the same; for an axial distance, when the radial distance is less than 8mm, the water temperature decreases extremely slow or remains unchanged along the radial direction on the major front of this section; and it decreases by small degrees when the radial distance is close to the wall; and the temperature of pipeline decreases rapidly along the radial direction; (3) The axial temperature drop velocity of water flow in low pressure pipeline are the same at different lengths of low pressure pipeline. It decreases with the increase of ambient temperature and the flux of water flow in low pressure pipeline; and it is almost identical when the entrance temperatures of water flow change little. (4) when the flux of water flow is 12L/min, the entrance temperature is 278.15K, the ambient temperature is 263.15K, 253.15K, 243.15K, 232.15K respectively, the maximum length of low pressure pipeline of pre-mixed abrasive water jet system suitable for low temperature environment is more than 500m, 368.5m, 252m, 187m respectively. This can provide a reference for engineering design of pre-mixed abrasive water jet system suitable for low temperature environment.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Jinfa Guan
AU  - Dan Shu
AU  - Jimiao Duan
AU  - Xiaochen Chen
AU  - Long Huang
PY  - 2018/05
DA  - 2018/05
TI  - Numerical simulation of heat transfer between low pressure pipeline of pre-mixed abrasive water jet system and low temperature environment
BT  - Proceedings of the 2018 8th International Conference on Manufacturing Science and Engineering (ICMSE 2018)
PB  - Atlantis Press
SP  - 618
EP  - 627
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmse-18.2018.113
DO  - 10.2991/icmse-18.2018.113
ID  - Guan2018/05
ER  -