Abstract Temporal variations in a combustion system are always present and take varieties of forms and intensity under different environments. A system is stable if a disturbance introduced into the system decreases in amplitude with time and eventually becomes lost in the random fluctuations prevailing in the system. A system is unstable if the amplitude increases with time. If an unstable combustion system is weakly coupled with the environment, a new equilibrium state of combustion will be reached without modifying the surroundings appreciably. A good example of this is the transition of a flame in open atmosphere from the laminar to the turbulent state. The instability of small disturbances (often referred to as Tollmien-Schlichting waves) is an inherent property of the flow of the combustible mixture. The unstable oscillations are present in a broad band rather than a few selected frequencies. The instability of such weakly coupled systems is of considerable scientific interest but does not possess direct relation with the instability of combustion in a rocket motor where the combustion is strongly coupled to its environment.


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    Title :

    Combustion Instability Theory


    Contributors:


    Publication date :

    1968-01-01


    Size :

    19 pages





    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English




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