Theoretical and Experimental Investigation of a Shock Wave Structure in Microporous Liquids
AKADEMIYA NAUK SSSR MOSCOW INST OF APPLIED MECHANICS
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Developing of new prospective samples of hypersonic air vehicles with Mach number of flight M5 requires a development of new engines since the efficiency of conventional jet- engines sharply decreases in this case. It is supposed to apply detonation and scram jets in this velocity range. One of the main requirement of such engines developing, testing and running consists in existence of cheap technological fuel. This fuel has to satisfy to ecological performance, it has to ensure a stable work of a scram jet at Mach numbers M3,5 divided by 14 and of a detonation engine at M0 divided by 9. Main direction of investigations is connected with such a fuel creation on basis of the aviation kerosene. In fact there is a problem of new fuel type creation with controlled physical and chemical properties depending on flight conditions. It is well known 1,2 that preliminary bubbling of the liquid fuel for example of the aviation kerosene by an oxidizer air, oxygen saturated air or by flammable gases CH4, H2, C2H2 essentially improves its spraying characteristics, mixing, range of a stream, and it decreases an ignition delay time. Generating of initial radicals, products of CO, H2, H2O incomplete burning, products of Sigma CxHy conversion and cracking during this process can essentially decrease an induction time of chain reactions at lower initial temperature of the air-fuel mixturesee. 2,4. All these factors in aggregate favorably influence development of combustion and detonation processes. In the work are presented means and results of new device tests, which insure generating of activated porous fuel on liquid hydrocarbon basis and have indicated above advantages as a unit.
- Jet and Gas Turbine Engines