Development of a Mixed Bed Catalytic System for Providing Endothermic Cooling with in-situ Generation of Hydrogen Gas for Scramjet Combustors

Kannan, R and Venu, G and Prateesh Kumar, P and Manjunath, P (2011) Development of a Mixed Bed Catalytic System for Providing Endothermic Cooling with in-situ Generation of Hydrogen Gas for Scramjet Combustors. In: ASET 2011- National Conference on Emerging Trends in Propulsion Technology, 17-18 Jun 2011, Liquid Propulsion Systems Centre (LPSC), Mahendragiri, Tamil Nadu .

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    Abstract

    When hypersonic vehicles operate at Mach numbers 4-8, the temperature of the hot parts of the combustor would increase from approximately 1000K to 4000K, and the thermal management of such large quantities of waste heat becomes an important design consideration. Endothermic cooling provides an efficient method of cooling scramjet combustors by making use of certain endothermic reactions, like for example, the catalytic cracking reaction. Apart from providing endothermic cooling, this technology can also be used for the in-situ generation of hydrogen gas in the cracked fuel. The presence of hydrogen decreases the ignition time and ignition delay of kerosene and it also helps in anchoring flames at high speeds of airflow in a scramjet combustor. We have developed a mixed bed catalytic system consisting of molecular sieves and reformax-100 catalysts for proving endothermic cooling as well as the in-situ generation of hydrogen gas. The results of our findings are described in this communication.

    Item Type: Conference or Workshop Item (Paper)
    Uncontrolled Keywords: Scramjet combustors;Endothermic cooling;Airflow;Hypersonic vehicles;Catalytic system
    Subjects: AERONAUTICS > Aeronautics (General)
    CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
    Division/Department: Propulsion Division, Propulsion Division, Propulsion Division, Propulsion Division
    Depositing User: Ms. Alphones Mary
    Date Deposited: 01 Jul 2014 09:45
    Last Modified: 28 Aug 2015 15:47
    URI: http://nal-ir.nal.res.in/id/eprint/11986

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