Experimental and numerical investigation of air entrainment into an infrared suppression device

2015 ◽  
Vol 75 ◽  
pp. 33-44 ◽  
Author(s):  
Ashok K. Barik ◽  
Sukanta K. Dash ◽  
Abhijit Guha
Keyword(s):  
Numerical Investigation ◽  
Air Entrainment

Experimental and numerical investigation of air entrainment into a louvred funnel

2014 ◽  
Vol 48 ◽  
pp. 176-185 ◽  
Author(s):  
Ashok K. Barik ◽  
Sukanta K. Dash ◽  
Pandaba Patro ◽  
Subrat Mohapatra
Keyword(s):  
Numerical Investigation ◽  
Air Entrainment

Numerical investigation of subsynchronous vibration in floating ring bearings

2018 ◽  
Vol 232 (11) ◽  
pp. 1390-1401 ◽  
Author(s):  
Yan Wang ◽  
Xiao-dong Ren ◽  
Xue-song Li ◽  
Chun-wei Gu
Keyword(s):  
Fourier Transform ◽  
Numerical Investigation ◽  
Computational Fluid Dynamic ◽  
Calculation Method ◽  
Fluid Dynamic ◽  
Air Entrainment ◽  
Shaft Speed ◽  
Dynamic Calculation ◽  
Mesh Motion ◽  
Motion Method

Floating ring bearings are popular among turbochargers due to their simplicity and reliability. The disappearance of subsynchronous vibration with the increase of shaft speed in a low oil-supplied pressure floating ring bearing is reported by Hatakenaka and Yanai. This finding may help eliminate the noise and decrease the loss of turbochargers. This work aims to explain this phenomenon in the low oil-supplied floating ring bearing using computational fluid dynamic. Steady computational fluid dynamic calculation is conducted to validate the effect of air entrainment. Transient computational fluid dynamic calculation method with mesh motion method is established. The subsynchronous vibration of the shaft can be obtained by discrete Fourier transform analysis. The results are validated by comparing them with those in the literature. It is found that the disappearance of the subsynchronous vibration is the result of the change in lubricant properties caused by the air entrainment.

Numerical Investigation of Discharge Current Path in a Hydrogen MPD Thruster

2016 ◽  
Vol 136 (3) ◽  
pp. 141-146 ◽  
Author(s):  
Akira Kawasaki ◽  
Kenichi Kubota ◽  
Ikkoh Funaki ◽  
Yoshihiro Okuno
Keyword(s):  
Numerical Investigation ◽  
Discharge Current ◽  
Current Path
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