Effect of surfactant on bubble generation using acoustic pressure wave and elastic tube with slit

2018 ◽  
Vol 2018 (0) ◽  
pp. OS2-22
Author(s):  
Hiroya YAMAMOTO ◽  
Yuma KASAI ◽  
Toshiyuki SANADA
Keyword(s):  
Pressure Wave ◽  
Acoustic Pressure ◽  
Elastic Tube ◽  
Bubble Generation ◽  
Acoustic Pressure Wave

scholarly journals Laser-induced optical breakdown applied for laser spark ignition

2010 ◽  
Vol 28 (1) ◽  
pp. 109-119 ◽  
Author(s):  
E. Schwarz ◽  
S. Gross ◽  
B. Fischer ◽  
I. Muri ◽  
J. Tauer ◽  
...  
Keyword(s):  
Pressure Wave ◽  
Internal Combustion Engines ◽  
Acoustic Pressure ◽  
Laser System ◽  
Optical Breakdown ◽  
Acoustic Energy ◽  
Pollutant Emission ◽  
High Peak Power ◽  
Laser Spark ◽  
Acoustic Pressure Wave

AbstractIn the present article, the experimental investigation of optical breakdown induced by ns/mJ pulses at two wavelengths, 1064 nm and 532 nm, in air of atmospheric pressure is reported and discussed. The obtained breakdown thresholds were compared with theory and are in good agreement. The generated plasmas have been characterized by their amount of scattered laser light, energy transmission, and change of the transmitted temporal shape. Laser-induced plasma formation in a gas, in air, also generates an acoustic pressure wave. The acoustic energy is compared to the laser pulse energy and is found to be linearly dependent. Moreover, the frequency distribution of the characteristic acoustic pressure wave was analyzed. The experiments described were accomplished in order to optimize a laser ignition system with regard to efficiency and costs. The laser system employed for these investigations is a compact high peak power, passively Q-switched, longitudinally diode-pumped solid-state laser. Such a “laser spark plug” should replace conventional spark plugs in internal combustion engines because conventional ignition has reached its limits in terms of efficiency and durability. Thereby, a reduction of pollutant emission should also be feasible.

Sign in / Sign up

Export Citation Format

Share Document