PULSE HIGH-SPEED ACTION OF A HOT GAS FLOW
ON A WALL OF CHROMIUM-NICKEL STEEL

D. P. Aleksandrov,a I. M. Gorkavchuk,a 
and V. F. Zakharenkovb 

UDC 531.5:539.37

Consideration has been given to the pulse action of a 
hot gas flow on a wall of chromium-nickel steel; an analysis has been 
made of the processes and phenomena of mechanical and thermoerosive 
wear and fatigue failure of the wall. A structural model of thermal 
fatigue of chromium-nickel steel has been developed. The wear of the 
wall of a tube with an inside diameter of 0.03 m under the pulse action 
of the gas flow and thermal stresses of the second kind has been evaluated 
numerically. The results of short-duration mechanical tests of 12Kh18N10T 
steel after thermocycling have been given.

aSt. Petersburg State 
Polytechnic University, 29 Politekhnicheskaya Str., St. Petersburg, 
195251, Russia; email: strenght@mtr.hop.stu.neva.ru; 
bD. F. Ustinov Baltic State Technical University "Voenmekh," 
1 1st Krasnoarmeiskaya Str., St. Petersburg, 190005, Russia. Translated 
from Inzhenerno-Fizicheskii Zhurnal, Vol. 77, No. 2, pp. 93-98, 
March-April, 2004. Original article submitted March 27, 2003.