Pressure control in a semi-closed volume upon combustion of solid propellants with an exponent in the combustion law greater than unity |
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Authors: | S M Ivanov N A Tsukanov |
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Affiliation: | (1) Moscow Institute of Heat Engineering, 129273 Moscow |
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Abstract: | The problem of pressure control in a semi-closed volume by changing the critical cross-sectional area of a gas-release channel
is considered upon solid-propellant combustion with the pressure, the combustion rate, and the free volume varied over a wide
range (not smaller than one order of magnitude). For a system of automatic pressure control, a control algorithm is chosen
and the conditions of partial parametric invariance with respect to the variable dynamic properties of the object to be controlled
are formulated. The experimental results obtained upon improvement of the control system for solid rocket propellants whose
exponent in the combustion law is greater than unity are given. The reasons for substantially nonstationary modes of operation
of this system are considered, and a simplified model that approximates the phenomena of nonstationary combustion of a solid
rocket propellant is proposed. The model is identified and the results of mathematical modeling are given. Recommendations
on pressure control in the nonstationary modes of operation are given.
Translated fromFizika Goreniya i Vzryva, Vol. 36, No. 5, pp. 45–56, September–October, 2000. |
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