SU731181A1 - Apparatus for detonation burning - Google Patents

Description

one

Inventive relate to devices detonation szhngann and can be used, for example, in the field of light engineering and chemistry of high-temperature reactions.

A device for detonation combustion is known, comprising a prechamber connected by an adapter and an Eurasia chamber, equipped with cooled fuel supply and oxidizer connections 1.

Such a design has low concentration limits of operation, as during the movement of the detonation wave from the prechamber into the combustion chamber along a smoothly expanding adapter for certain concentrations of gas mixtures, it weakens to such an extent that a considerable length of the combustion chamber is required to restore it.

The aim of the invention is to expand the range of sustainable operation. It is achieved by the fact that the transition is divided by longitudinal partitions into channels, and the cross section of each of which does not exceed the size of the pre-chamber cross section.

FIG. 1 shows a longitudinal section of a detonation combustion device; in fig. 2 is a view along arrow A in FIG. one.

It contains refrigerated connections.

supply of fuel and oxidant sootvetsino 1,2, prechamber 3 with igniting

ycTpoiiCTBOM 4 and the combustion chamber 5. The prechamber 3 and the chamber of the bay 5 are connected by 5 rehodiyik 6, divided by longitudinal

partitions 7 to channels 8, through passage

the cross section of each of which does not exceed

Pre-chamber passage section 3.

During operation of the detonation device

10, combustion of fuel and oxidizer through supply pipes 1, 2 enter the prechamber 3 and the combustion chamber 5. The fuel consumption is selected so that the full filling of the prechamber 3 volumes with adapter 6 and the combustion chamber 5 ends at the same time. Upon completion of filling, the igniter 4 ignites the combustible mixture, the deflagration mode of grief turns into detonation. From the fork 20 iViepbi 3, the detonation wave enters the adapter 6, where it propagates along the channel of the channels 8. At the same time, since the cross-sectional area of the channels 8 does not even increase the cross-sectional area

25 of the pre-chamber 3, the detonation wave enters channel 8, which is weakly weakened, and during the movement in the channel it recoils. To restore, the detonation wave must be driven through channels 8

30 several kalnbrov (the number of calibers depends on the mixture of gases used). Thus, during movement of the detoopaciating wolves in transition 6, a system of detonation waves occurs, propagating in channels 8 independently of each other, with detonation waves having normal detonation parameters at the output of channels 8. Due to the fact that the total cross-sectional area of the channels 8 at the exit is equal to the non-sectional area of the combustion chamber 5, the system of detonation waves in the channels 8 is combined into a single practically non-attenuated detonation wave.

After the combustion of the fuel mixture, the burned products are removed from the bottom of the pre-chamber 3, the adapter 6 and the combustion chamber 5 by a stream of fresh components of the combustible mixture, and after filling the pulse detonation combustion chamber with the combustible mixture, the cycle is repeated.

Thus, the proposed device will allow the concentration concentration limits of the stable operation of the detonation combustion chamber and increase its efficiency to be increased.

For example, when used as a generator of bound nitrogen

in the production of nitric acid, the proposed device will work stably at an excess oxide: itel OS 1,, 6 ratio, while for prototype a does not exceed 1.1 -1.2. Since the amount of nitrogen oxides at the outlet of the chamber depends on the coefficient of excess oxidant and reaches a maximum at a-1,, 6, the proposed device will increase the yield of nitric acid by about 5 times.

F o rm y; i inventions

A detonation combustion device containing a pre-combustion chamber combustor adapter, equipped with cooled nozzles of fuel and oxidant, characterized in that

extending the limits of work steadily, the guide is divided into channels along the groove, the flow area of each of which does not exceed the flow section of the prechamber.

P1 sources information,

Note for examination and examination 1. USSR author's certificate No. 492193, cl. F 23R, 1/12, 1971.

FIG. I

Claims (1)

Claim 15 A detonation combustion device, comprising a combustion chamber connected by an adapter, provided with cooled nozzles for supplying fuel and an oxidizing agent, characterized in that, in order to expand the limits of stable operation, the adapter is divided by longitudinal partitions into channels, the passage section of each of which does not exceed the passage section of the prechamber . 25 Sources of information taken into account during the examination 1. USSR copyright certificate No. 492193, cl. F 23R, 1/12, 1971. View g