Power plants – Combustion products used as motive fluid
Patent
1998-01-30
1999-12-07
Casaregola, Louis J.
Power plants
Combustion products used as motive fluid
60 39461, F02C 320
Patent
active
059963328
DESCRIPTION:
BRIEF SUMMARY
SPECIFICATION
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a national stage of PCT/DE 97/00612 filed Mar. 26, 1997 and based upon German national application 196 12 507.3 of Mar. 29, 1996 under the International Convention.
FIELD OF THE INVENTION
The present invention is directed to a method of driving a shaft as well as to a drive mechanism for carrying out such method.
BACKGROUND OF THE INVENTION
From DE-OS-22 31 008 it is known to use tetrasilane (Si.sub.4 H.sub.10) as a rocket propellant. DE 42 15 835 c2 also describes silicon hydrides, preferably silane oils, as rocket propellants. The production of such silane oils is described in DE-PS 21 39 155. In the systems described in these publications the silane oils are burned together with liquid oxygen, liquid chlorine or liquid fluorine.
In the non-published German patent application P 44 37 524.7 (see also U.S. Pat. No. 5,730,390 of Mar. 24, 1998) a method for operating a reaction-type missile propulsion system and a drive mechanism for carrying out such method are described. The drive mechanism is operated in such a manner that silicon hydride compounds are reacted with nitrogen and/or nitrogen compounds at increased temperatures in the presence of an oxidizing agent for the hydrogen of the silicon hydride compounds. Preferably, the nitrogen and the oxydizing agent can be taken from the atmosphere of the earth so that a corresponding oxidizing agent for the silicon hydride compounds need not be carried along in the missile. Preferably, silane oils are burned as silicon hydride compounds.
OBJECT OF THE INVENTION
It is an object of the present invention to provide a method of driving a shaft as well as a drive mechanism therefor which operate with very high temperatures and a correspondingly high efficiency and which have little pollution effects.
SUMMARY OF THE INVENTION
According to the invention this the following steps: combustion chamber; amount of oxygen of the introduced air for the generation of increased temperatures; increased temperatures with the silicon of the silicon hydrides for the generation of silicon nitride; hydrogen portion from the first part into the second part of the double combustion chamber and mixing these combustion products with a large amount of air with after-burning of the hydrogen; and chamber for driving turbine blades connected to a shaft.
The N.sub.2 -molecule as such, notwithstanding its triple bond, is extremely inactive and tends to open its linkage only with electron bombardment, for instance in thunderstorms, and reacts with oxygen so that nitric oxides are formed. However, above 1400.degree. C. hot nitrogen reacts with finely distributed silicon and forms silicon nitride Si.sub.3 N.sub.4. The reasons for this nitrogen combustion can be found in the fact that silicon, in contrast to carbon, cannot enter into double bonds or triple bonds. Nitrogen shows an especially good reaction performance with silicon hydride compounds. The invention takes advantage of this recognition and uses intentionally nitrogen or nitrogen compounds for the reaction with silicon hydride compounds whereby an especially efficient propelling system can be obtained. Nitrogen is at disposal in big amounts in the atmosphere so that a high efficiency with low costs results.
When burning silicon hydride compounds, especially silane oils, with compressed air the oxygen portion reacts with the hydrogen of the silane chain in accordance with the equation
In this hydrogen-oxygen combustion temperatures of about 3000.degree. C. are reached. This temperature is sufficient in order to crack the N.sub.2 -molecule which is presented by the supply of the compressed air. According to the equation vehemence. Silicon nitride is formed which has a molecular weight of 140 and thus is nearly three times as heavy as carbon dioxide.
Of course, the cited reaction occurs only with correspondingly high temperatures. In the air silane oils after ignition burn only to develop red-brown amorphous silicon monoxide since the combustion subs
REFERENCES:
patent: 3665862 (1972-05-01), Lane
patent: 4787208 (1988-11-01), DeCorso
patent: 4912931 (1990-04-01), Joshi et al.
patent: 5775096 (1998-07-01), Plichta
Casaregola Louis J.
Dubno Herbert
Klaus Kunkel
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