Milosevic H.   Rychkov A.  

Numerical modeling of cooling action of high temperature combustion products with using filling granular filters

Reporter: Rychkov A.

     The solid propellant gas generators having high gas capacity are widely used for fast pressurization of elastic shells of saving devices of different applications. A typical example of such devices are safety system of automobile (airbags). However the temperature of combustion products even of  "low-temperature" fuel compositions of gas generators appears not below 1500К and to reduce of its it is necessary to apply a various types of porous and filling granular filters.
     There are passive and active granular filters.  The passive filter can cool of combustion products as a result of absorption of heat only. The active cooling is evaporation of  the granule material  and in this case takes a place more intensive cooling of combustion products in the filter. The numerical modeling of cooling process of high-temperature combustion products at their movement in bulk of granular filter of active cooling is investigated.  
       The upwind difference scheme of the second order of the accuracy with TVD properties was applied to calculation of the movement of gas. The results of calculations at various values of key parameters of the active and passive filters allow to draw a conclusion about enough high efficiency of active cooling filters.

Abstracts file: Abstract.doc
Full text file: Rychkov.pdf

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