NONSTATIONARY HEAT EXCHANGE IN THE TRACHEA OF HUMAN LUNGS

K. M. Aref'ev, E. D. Fedotovich, and A. A. Khrushchenko

UDC 536.24

Calculations of the heat exchange in the trachea of human 
lungs have been carried out. Unlike other works in this field, in 
the present work the authors have taken account of the nonstationarity 
of the processes, which is related to the alternation of inhalations 
and exhalations and the variability of the air flow rates. Nonstationary 
changes in the temperature of trachea walls in quiet breathing have 
been calculated in different cases.

St. Petersburg State Polytechnic University, St. Petersburg, 
Russia. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 76, No. 
4, pp. 128-133, July-August, 2003. Original article submitted 
November 12, 2002.