TRANSITION FROM THE REGIME OF LOW RATES OF FILTRATION 
COMBUSTION OF GASES TO THE REGIME OF HIGH RATES 
WITH A PRESSURE INCREASE

K. V. Dobrego , S. A. Zhdanok ,
A. V. Krauklis , E. I. Khanevich, 
and A. I. Zaruba

UDC 536.46

Regularities of the transition from the regime of 
low rates (RLR) of filtration combustion (FC) of gases to the regime 
of high rates (RHR) with a pressure increase are investigated. It 
is shown that allowance for gas-phase transfer is important for description 
of FC, at least when the size of the skeleton pores  d > 1.5-2.0 mm 
and the calorific power of the fuel exceeds the limit of propagation 
of the flame. With an increase of 1-2 atm in the working pressure 
as compared to atmospheric pressure the critical pore size decreases 
by a factor of 2.0-2.5. A theoretical model that makes it possible 
to evaluate the velocities and temperatures of FC stationary waves 
under conditions of the transition from RLR to RHR and to establish 
realization limits for these regimes is proposed. It is shown that 
a more adequate description of the transient regime and the regime 
of high rates is achieved when the turbulent character 
of the combustion is allowed for.

JEPTER7492019998
JEPTER749208