RU106666U1 - MOTOR INSTALLATION WITH A PLANE CENTRAL BODY - Google Patents

Abstract

 A propulsion system comprising a flat central body made in the form of a wedge and two rows of circular combustion chambers located on each side of the base of the flat central body, characterized in that each combustion chamber is equipped with a sound nozzle, and each row of combustion chambers with sound nozzles is equipped with a common a flat collector chamber mounted between a series of sonic nozzles and a flat central body, while the entire width of the cent The body of the body has a narrow flat gap for the outflow of a supersonic jet.

Description

The proposed utility model relates to the field of rocket science, in particular to liquid rocket engines.

A nozzle with an external extension (pin nozzle) is known, consisting of a round central body made in the form of a pin, a torus chamber is installed along the perimeter of the base, and a narrow annular gap is organized between the torus chamber shell and the round central body. [The book "Fundamentals of the theory and calculation of liquid rocket engines." Edited by V.M. Kudryavtsev. Volume 1, p. 370].

In a nozzle with an external extension (pin nozzle), a supersonic jet flowing out of a narrow annular gap is limited, on the one hand, by the solid wall of the central body, and, on the other hand, by the free surface of the jet (limiting current line), which is limited by atmospheric pressure at a given height rocket flight (gas pressure at the outer boundary of the jet is always equal to atmospheric). Due to the presence of the free surface of the jet, the nozzle with external expansion has the ability to automatically control the altitude, that is, at any height of the flight of the rocket, the nozzle always works in the calculated mode.

The disadvantage of this technical solution is that the known nozzle can only work on solid fuel, which limits the use of a pin nozzle (a torus combustion chamber operating on liquid fuel has not yet been created).

A propulsion system is also known, comprising a flat central body made in the form of a wedge, and two rows of circular combustion chambers with supersonic nozzles located on each side of the base of the flat central body. Traction profiled flat walls of the central body are a continuation of the contours of round supersonic nozzles (see figures 1 and 2). [MULTIDISCIPLINARY APPROACH TO LIHEAR AEROSPIKE NOZZLE OPTIMIZATION. J.J. Korte, A.O.Salas, H.J. Dunn and N.M. Alexandrov. NASA Langley Research Center, Hampton, Virginia 23681 and W.W. Follett, G.E. Orient and A.H. Hadid. Rocketdyne Division of Boeing North American, Canoga Park, CA 91309. NASA-AIAA-97-3374.pdf | and at www.answers.com "The Aerospike Engine".

With this scheme of a propulsion system in a nozzle with a central body (in a pin nozzle) instead of a torus chamber, a bunch of round combustion chambers with supersonic nozzles placed in one row across the width of a flat central body on each side of it is used (see Figs. 1 and 2).

The disadvantage of this scheme of a propulsion system with a flat central body is the significant loss of traction caused by the collision of supersonic jets on the wall of the flat central body, which each individually flow from supersonic nozzles, while supersonic jets never mix.

The purpose of this utility model is to increase the efficiency of a propulsion system with a flat central body.

The goal is achieved in that in a propulsion system containing a flat central body made in the form of a wedge and two rows of circular combustion chambers located on each side of the base of the flat central body, characterized in that each combustion chamber is equipped with a sound nozzle, and each row of chambers combustion with sound nozzles is equipped with a common flat chamber-collector installed between a series of sound nozzles and a flat central body, while between the shell of the common flat chamber-collector and a flat central body A narrow, flat gap for the outflow of a supersonic jet is lowered over the entire width of the central body.

Figure 1 shows a photo of a propulsion system with a flat central body equipped with cameras with supersonic nozzles.

Figure 2 shows a General view of the propulsion system with a flat central body equipped with cameras with supersonic nozzles.

Figure 3 shows a longitudinal section of a propulsion system with a flat central body equipped with a common collector chamber and combustion chambers with sound nozzles.

Figure 4 shows a top view of the propulsion system with a flat central body, equipped with a common collector chamber and combustion chambers with sound nozzles.

A propulsion system with a flat central body (Fig. 3) comprises a flat central body 1 made in the form of a wedge and two rows of circular combustion chambers 4 located on each side of the base of the flat central body 1. According to the proposed utility model, each combustion chamber 4 is equipped with a sound a nozzle 5 mounted coaxially with it, and each row of combustion chambers 4 with sound nozzles 5 is equipped with a common flat chamber-collector 2, installed between a number of sound nozzles 5 and a flat central body 1. In this case, between the shell flat reservoir chamber 2 and a flat central body 1 arranged on the entire width of the central body 3 a narrow planar gap for the flow of a supersonic jet.

The inventive propulsion system with a flat central body operates as follows.

The products of combustion of the fuel component from the sonic nozzles 5 of the combustion chambers 4 flow at a sound velocity into a flat manifold 2. Since the velocities of the gas jets flowing from the sonic nozzles are sonic, their mixing easily occurs in a common planar manifold 2. Then the gas stream from the flat chamber-collector 2 expires at a supersonic speed in a single continuous stream through a narrow flat slit 3.

A free expansion and acceleration of a continuous supersonic gas jet occurs on a curved contour of a planar central body 1, and a flow reversal occurs on the edge of a narrow planar slit 3, organized over the entire width of a planar central body 1 (a Prandtl-Meyer flow occurs) until the pressure gas at the outer boundary of the free stream does not equal atmospheric.

Thus, in a propulsion system with a flat central body, the supersonic jet is limited on one side by the solid wall of the flat central body and, on the other, by the external boundary current line (atmospheric pressure), as a result of which such a propulsion system at any height of the rocket’s flight (and in height flight, atmospheric pressure, as you know, is variable) always works in the calculated mode.

In this case, a common flat collector chamber is used as a receiver for the accumulation of fuel combustion products; there is no combustion of the fuel components in it. Therefore, in a common flat collector chamber, high-frequency fluctuations in gas pressure and the associated destruction of the flat collector chamber do not occur.

Using the utility model allows to eliminate thrust losses resulting from the collision of supersonic jets on the wall of a flat central body, since they no longer appear on its surface, which makes it possible to increase the payload or flight range of the aircraft, which in turn gives a positive economic Effect.

Claims (1)

A propulsion system comprising a flat central body made in the form of a wedge and two rows of circular combustion chambers located on each side of the base of the flat central body, characterized in that each combustion chamber is equipped with a sound nozzle, and each row of combustion chambers with sound nozzles is equipped with a common a flat collector chamber mounted between a series of sonic nozzles and a flat central body, while the entire width of the cent The body of the body has a narrow flat gap for the outflow of a supersonic jet.