Power plants – Reaction motor
Patent
1987-07-31
1989-07-04
Casaregola, Louis J.
Power plants
Reaction motor
60221, 440 38, F02K 1100, B63H 1110
Patent
active
048438146
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention is directed to an assembly for producing a propulsive force by variation of the impulse of inflowing and outflowing fluids.
BACKGROUND AND DESCRIPTION OF PRIOR ART
Engine systems of this type are known for use as propellers or jet engines in aircraft and ships. With propellers or jet engines, a fluid having the mass m is sucked in at the velocity w in opposition to the desired direction of movement of the body to be propelled, the relative velocity of flow of the fluid through the propeller or the jet engine is increased to the velocity c, and the fluid is ejected at the relative velocity c (relative to the propeller or jet engine) in opposition to the direction of movement of the body. That is, the impulse of the fluid flowing through the body is varied within the body as to its magnitude. Thus, a stabilizing force acts on the body and as a reactive force is directed against the force variation at the fluid and therefore acts in the direction of movement of the body. The force magnitude in the direction of movement is I=m(c-w). For rockets, the force is generated by ejection at the velocity c of a medium that is carried along. The force magnitude therefore is I=m.multidot.c.
In drive systems of this type the level of the maximum impulse at low velocities is hardly above the force at higher velocities. For propellers and jet engines, the increase of the body velocity v is accompanied by an increase of the inflow velocity w. Thereby the specific force per kg of medium throughput is decreased. But with increasing velocity v, the dynamic pressure forward of the engine and thus the outflow velocity c will also increase, and the throughput of the mass m will also increase, so that on the whole the thrust remains more or less constant. For rockets, the constancy of the propulsive force can be taken direct from the formula.
The effect of transmissions is known in relation to vehicle drive systems. By means of the transmissions it is possible at low speeds to increase the maximum output torque at the wheels, whereby the propulsive force and the accelerating ability are improved while the amount of energy consumed is reduced.
It is the object of the invention to permit an increase in the propulsive force at low speeds also for drive systems of the kind which operate with a force variation of a sucked-in and ejected fluid.
SUMMARY OF THE INVENTION
The solution of the specified object is characterized in that, the fluid which is accelerated and sucked in by the induced negative pressure is subjected to a change in the direction of flow in a channel which is fixedly provided on the driven body. Due to the change of direction the fluid flowing through the channel produces a force against the channel walls. This force is oriented such that, in addition to the force generated by the ejected fluid, it acts in the direction of movement. Thereby the force mw resulting from the fluid which flows in against the direction of movement of the body is prevented, on the one hand, and the force directed against the channel wall is added to the "reactive thrust" of the ejected fluid, on the other hand.
It is therefore possible with the assembly according to the invention to provide for a drastic increase in the take-off thrust and/or a substantial reduction in the fuel consumption of aircraft and water craft. Due to the increased take-off acceleration, aircraft will need only short runways; the reduced fuel consumption results not only in less environmental pollution but also permits a reduction in the on-board fuel supply whereby the load carrying capacity and economy of the craft are increased.
Advantageous further developments for impulse coupling as well as applications and embodiments of the invention are described below.
BRIEF DESCRIPTION OF THE APPLICATION DRAWINGS
Below, the invention will be described in detail with reference to the drawing, in which
FIG. 1 is a schematic sectional view through an assembly for increasing the propulsive force, to be used in conjunction with a pr
REFERENCES:
patent: 2398113 (1946-04-01), Parrish
patent: 3041831 (1962-07-01), Singleman
patent: 3095696 (1963-07-01), Rumble
patent: 3247667 (1966-04-01), Adams et al.
patent: 3276415 (1966-10-01), Laing
patent: 3354650 (1967-11-01), Malroux
patent: 3462955 (1969-08-01), Lockwood et al.
patent: 3756019 (1973-09-01), Holzapfel et al.
patent: 3835643 (1974-09-01), DeGarcia et al.
patent: 4672807 (1987-06-01), Gongwer
LandOfFree
Assembly for producing a propulsive force does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Assembly for producing a propulsive force, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Assembly for producing a propulsive force will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-842746