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Web of Proceedings - Francis Academic Press
Web of Proceedings - Francis Academic Press

Study on Pressure and Velocity Characteristics of Double Chamber Self-excited Oscillating Nozzle under Different Second Chamber Length

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DOI: 10.25236/icmbmm.2018.43

Author(s)

Xiaojun Zhang, Xiaqing Li, Yang Miao

Corresponding Author

Xiaojun Zhang

Abstract

Self-excited oscillating pulse nozzles are widely used in cleaning, mining and fire protection because of their high efficiency and low cost. In this work, the CFD numerical simulation technology and the acceleration factor γ assistant evaluation method are used to study the pressure and velocity characteristics of double chamber self-excited oscillating nozzle under different second chamber length. And the pressure and velocity characteristics of the self-excited oscillating nozzles are compared and analyzed to find out the critical factors that affect the pulsed jet. The results show that increase of the length of the second chamber can effectively increase the acceleration effect of the jet speed, and thus enhancing the effect of the jet pulsation.

Keywords

CFD, Acceleration factor γ, Pulsed jet,