Performance comparison between the conventional and blade-designed two-fluid pressure nozzles via CFD simulation
Che-Hao Hsu,
Hong-Ping Cheng,
Yu-Cheng Chou,
Guang-Xiang Liu,
Hsu-Yu Chen,
Chien-Hsun Lee,
Chin-Chi Cheng
Affiliations
Che-Hao Hsu
Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei, Taiwan, 1, Sec. 3, Zhongxiao E. Rd., Taipei 10608, ROC
Hong-Ping Cheng
Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei, Taiwan, 1, Sec. 3, Zhongxiao E. Rd., Taipei 10608, ROC
Yu-Cheng Chou
Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei, Taiwan, 1, Sec. 3, Zhongxiao E. Rd., Taipei 10608, ROC
Guang-Xiang Liu
Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei, Taiwan, 1, Sec. 3, Zhongxiao E. Rd., Taipei 10608, ROC
Hsu-Yu Chen
Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei, Taiwan, 1, Sec. 3, Zhongxiao E. Rd., Taipei 10608, ROC
Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei, Taiwan, 1, Sec. 3, Zhongxiao E. Rd., Taipei 10608, ROC; Corresponding author.
This study aims to evaluate the performance differences between a conventional pressure twin-fluid nozzle and a blade-designed nozzle, hypothesizing that the blade-designed nozzle can achieve superior gas-liquid interaction. The research of the velocity distribution and atomization behavior of two nozzle designs provides insights into improving nozzle efficiency and suitability for various industrial spray applications. Simulations were conducted under fixed pressure (2 bar) using two Newtonian liquids—water and a glycerol/water mixture with viscosities of 1 mPa s and 100 mPa s, respectively—and air velocities of 60 m/s and 100 m/s. Results demonstrate that the blade-designed nozzle's dispersed-blade outlet effectively directs internal gas flow, reducing velocity stratification and enhancing gas-liquid interaction near the nozzle exit. This design results in a broader atomization range and more uniform velocity distribution, making it suitable for industrial applications requiring efficient and consistent spray coverage.
