SU1105730A1 - Pulsing combustion gas generator - Google Patents

Abstract

A PULSING BURNING GAS GENERATOR containing a combustion chamber with an ignition compartment in which the igniter and a fuel nozzle are located, which is different from the fact that, in order to improve efficiency, the combustion chamber is rectangular in section with an angle divider on the outside and enclosed in a casing with the formation of channels connected to the ignition compartment, the gas generator further comprising a fuel preheater fixed to the inner wall of the chamber and connected to the fuel nozzle by a pipe, the preheater wall located opposite the inlet of the pipe, made in the form of an elastic membrane, and overlapping this hole. "L

Description

11 The invention relates to power engineering and is intended for use primarily in heating installations used for heating production facilities in agriculture, construction, etc., and can also be used to flame the surfaces of metals, reinforced concrete and rocks. A pulsating combustion device is known that contains a combustion chamber with a fuel inlet unit equipped with a pulsator, as well as an air supply unit G P. A disadvantage of the known device is low efficiency due to the energy costs of driving the pulsator and supplying fuel under pressure. The closest in technical essence to the present invention is a pulsating combustion gas generator containing a combustion chamber with an ignition compartment in which the igniter and the fuel nozzle 2 are placed. A disadvantage of the known device is low economy. The purpose of the invention is to increase efficiency. This goal is achieved by the fact that in a pulsating combustion gas generator containing a combustion chamber with an ignition compartment in which the igniter and a fuel nozzle are located, the combustion chamber is made rectangular, is provided with an angled divider at the outlet and is enclosed outside into the casing with formation of channels connected to the compartment ignition, the gas generator further comprises a fuel preheater mounted on the inner wall of the chamber and connected to the fuel nozzle via a pipe, the walls ka heater, located opposite the inlet of the nozzle, made in the form of an elastic membrane that overlaps this hole Figure 1 shows a gas generator longitudinal section; in fig. 2 is a section A-A in FIG. The gas generator contains a combustion chamber 1 with an ignition compartment 2, in which the igniter 3 and the fuel nozzle 4 are located. The combustion chamber 1 is provided at the outlet with an angle divider 5 and is encased in b to form channels 7, connected 2 to compartment 2. The gas generator is also equipped with a heater 8 fuel connected to the fuel nozzle 4 pipe 9, and the wall of the heater 8, located opposite the inlet 10 of the pipe 9, is filled in the form of an elastic membrane 11. When the gas generator in the combustion chamber 1 through the heater 8, Pat ubok 9 and nozzle 4 fed fuel. After filling the chamber 1, the igniter 3 is turned on. In this case, a spike and a spasmodic pressure occur. Combustion products rush to exit from combustion chamber 1. The combustion products have a high temperature and pressure, so the fuel in the preheater 8 warms up and begins to evaporate. The pressure from the combustion chamber 1 of the membrane 11 is pressed against the wall of the combustion chamber 1 and closes the opening 10, stopping the fuel supply; The pressure wave from the flare in chamber 1 of the combustion reaches the divider 5 at the outlet and. is divided here into two parts. One part comes out of chamber 1, and the second through channels 7 is returned back to the entrance of combustion chamber 1, and the pressure wave itself from the flash in combustion chamber 1 is reflected from the output as a rarefaction wave, which goes back to the combustion chamber 1. As a result, a rarefaction wave also arrives at the entrance to the combustion chamber 1 and through channels 7 a pressure wave compressing the air therein. Under the action of an increased pressure drop from the channels 7, the air flows into the combustion chamber 1 and mixes with the fuel entering through the nozzle 4. Air is mixed with fuel first inside the ignition compartment 2, and then the fuel mixture fills part of the combustion chamber 1 and ignites from the hot parts of the structures when a certain pressure is reached. The process is then repeated in the order described. The blowing of the channels 7 connecting the inlet and outlet of the chamber 1 with fresh air occurs as a result of the reflection of pressure waves from their ends, as well as due to the ejection of air flow during the outflow

Combustion near the entrance and exit of the combustion chamber 1. The pressure and rarefaction waves, as is well known, can move both down and upstream, so that the flow through channels 7 does not change in principle the pattern of wave pressure exchange and circulation // V / /

BUT/

/

.

fj

Yu

The waves are closed in a closed loop: combustion chamber 1, channels 7 - combustion chamber 1.

The use of the proposed device will improve efficiency. by reducing fuel consumption.

Aa

Vue, 2

Claims (1)

PULSE-BURNING GAS GENERATOR, comprising a combustion chamber with an ignition compartment, in which an ignitor and a fuel nozzle are located, characterized in that, in order to increase efficiency, the combustion chamber is made in a rectangular section, is provided with an angled divider at the outlet and is enclosed externally in a casing with the formation of channels connected to the ignition compartment, the gas generator additionally comprising a fuel heater mounted on the inner wall of the chamber and connected to the fuel nozzle by means of a pipe and, moreover, the wall of the heater, located opposite the inlet of the nozzle, is made in the form of an elastic membrane overlapping this hole. , 0. SU.1105730 1 105730