Shock Waves

, Volume 14, Issue 1, pp 73–82

Multiple pulsed hypersonic liquid diesel fuel jetsdriven by projectile impact

  • K. Pianthong
  • K. Takayama
  • B. E. Milton
  • M. Behnia
Original article

DOI: 10.1007/s00193-004-0237-2

Cite this article as:
Pianthong, K., Takayama, K., Milton, B.E. et al. Shock Waves (2005) 14: 73. doi:10.1007/s00193-004-0237-2

Abstract.

Further studies on high-speed liquid diesel fuel jets injected into ambient air conditions have been carried out. Projectile impact has been used as the driving mechanism. A vertical two-stage light gas gun was used as a launcher to provide the high-speed impact. This paper describes the experimental technique and visualization methods that provided a rapid series of jet images in the one shot. A high-speed video camera (106 fps) and shadowgraph optical system were used to obtain visualization. Very interesting and unique phenomena have been discovered and confirmed in this study. These are that multiple high frequency jet pulses are generated within the duration of a single shot impact. The associated multiple jet shock waves have been clearly captured. This characteristic consistently occurs with the smaller conical angle, straight cone nozzles but not with those with a very wide cone angle or curved nozzle profile. An instantaneous jet tip velocity of 2680 m/s (Mach number of 7.86) was the maximum obtained with the 40\(^\circ\) nozzle. However, this jet tip velocity can only be sustained for a few microseconds as attenuation is very rapid.

Keywords:

multiple pulsed jethypersonic diesel fuel jetsjet shock wave

Copyright information

© Springer-Verlag Berlin/Heidelberg 2005

Authors and Affiliations

  • K. Pianthong
    • 1
  • K. Takayama
    • 2
  • B. E. Milton
    • 3
  • M. Behnia
    • 3
  1. 1.Department of Mechanical Engineering, Faculty of EngineeringUbon Ratchathani UniversityThailand
  2. 2.Interdisciplinary Shock Wave Research Center, Institute of Fluid ScienceTohoku UniversitySendaiJapan
  3. 3.School of Mechanical and Manufacturing EngineeringThe University of New South WalesSydneyAustralia