CN115614184A - Small-sized steam generator - Google Patents

Abstract

The invention discloses a small-sized steam generator, which relates to the field of rocket engine test research, and uses gas hydrogen, gas oxygen and water as the medium, and has a flow rate of 650g/s. The flow rate and temperature of the steam generator can be adjusted according to the needs, and the gas hydrogen oxygen torch igniter is used for ignition. The invention can generate high-quality high-temperature and high-pressure steam to provide ejection medium for high-altitude simulation tests of small rocket engines. Generally speaking, the steam injection medium provided by the invention provides a strong guarantee for the high-altitude simulation test research of small rocket motors.

Description

a small steam generator

technical field

The invention relates to the field of rocket engine test research, in particular to a small steam generator.

Background technique

When developing a new type of upper-stage rocket engine, determining the high-altitude characteristics of the rocket engine is one of the important tasks of the engine ground test vehicle. The ambient pressure of the rocket engine is very low. During the test drive on the ground, a low-pressure vacuum environment of a corresponding height must be established to truly simulate the high-altitude characteristics of the rocket engine. This requires the establishment of ground vacuum test equipment.

Due to the huge construction cost of a full-scale high-altitude simulation test bench for rocket engines, in order to reduce research costs and speed up research progress, it is an economical and efficient development method to conduct scaled-down high-altitude simulation tests on engines in the early stages of development of new upper-stage rocket engines. This requires a small steam generator that can meet the needs of the test to meet the requirements of the injection system for the injection medium.

In addition, for the new engine in the development stage, it is inevitable to conduct experimental research on different working condition parameters during the test, which also changes the vacuum degree requirements provided by the high modulus system, which in turn requires different steam generator flow rates, pressures, and temperatures And other parameters, the parameters of the steam generator need to have a large adjustable margin.

Contents of the invention

The purpose of the present invention is to provide a small-sized steam generator, which is used in the high-altitude simulation test research of small rocket motors. The problems to be solved in the present invention are: (1) provide stable high-quality high-temperature steam to provide medium for the start-up of the injection system; (2) parameters such as flow, pressure, and temperature of the steam can be adjusted to meet the test requirements of multiple working conditions .

The technical scheme of the present invention is: the first-stage steam generator adopts gas oxygen, gas hydrogen and water as medium to generate steam. The steam pressure of the steam generator is 2MPa, and the steam temperature is 573K. The flow and temperature can be adjusted according to the needs. The total flow of the steam generator is 650g/s, the oxygen is 110g/s, the hydrogen is 15g/s, the water flow is 525g/s, and the hydrogen-oxygen mixing ratio is 7.3. Use gas hydrogen oxygen torch igniter to ignite. The head of the steam generator adopts three coaxial nozzles, the flame guide tube of the igniter is located in the center, the oxygen nozzle is in the middle, and the hydrogen nozzle is the outermost. After ignition is complete, the oxygen in the igniter is cut off, and the flame arrester is used as a hydrogen nozzle. The body adopts a water-cooled jacket and a spray cooling hybrid method. The cooling water opens the injection hole 7 circles. The first circle is the injection panel, injecting along the axial direction, the hole diameter is 0.5mm, 16, and the distribution flow accounts for 11.3%; the second to seventh circles are all radial injection, the hole diameter is 0.7mm, the quantity They are 8, 8, 8, 12, 12, and 16, respectively, and the distribution traffic ratios are 11.1%, 11.1%, 11.1%, 16.6%, 16.6%, and 22.2%. The total length of the primary generator is 833mm, the maximum outer diameter is 138mm, and the main material is 304 stainless steel.

The advantages and positive effects of the present invention are: (1) gas hydrogen, gas oxygen and water are used as the steam generation medium, the medium is easy to obtain, the supporting system is simple, and the steam quality is high; (2) it can provide high-altitude simulation tests for rocket engines High-quality ejection steam provides test conditions for the development of upper-stage rocket engines; (3) The flow, pressure, temperature and other parameters of the steam generator are adjustable, which can meet the needs of multi-working conditions tests and improve the efficiency of tests.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings are the basic design method of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative work.

Fig. 1 is a schematic structural view of a small steam generator of the present invention.

Fig. 2 is a partial structural schematic diagram of the small steam generator of the present invention.

1. Igniter flame guide; 2. Gas oxygen head; 3. Seal ring; 4. Gas hydrogen head; 5. Seal ring; 6. Seal ring; 7. Cooling end pressure measuring point; 8. Cooling water outside 9. Cooling water inner cylinder; 10. Water inlet; 11. Seal ring; 12. Seal ring; 13. Mixing chamber; 14. Mounting flange.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

The primary steam generator uses gas oxygen, gas hydrogen and water as medium to generate steam. The steam pressure of the steam generator is 2MPa, and the steam temperature is 573K. The flow and temperature can be adjusted according to the needs. The total flow of the steam generator is 650g/s, the oxygen is 110g/s, the hydrogen is 15g/s, the water flow is 525g/s, and the hydrogen-oxygen mixing ratio is 7.3. Use gas hydrogen oxygen torch igniter to ignite. The head of the steam generator adopts three coaxial nozzles, the flame guide tube of the igniter is located in the center, the oxygen nozzle is in the middle, and the hydrogen nozzle is the outermost. After ignition is complete, the oxygen in the igniter is cut off, and the flame arrester is used as a hydrogen nozzle. The body adopts a water-cooled jacket and a spray cooling hybrid method. The cooling water opens the injection hole 7 circles. The first circle is the injection panel, injecting along the axial direction, the hole diameter is 0.5mm, 16, and the distribution flow accounts for 11.3%; the second to seventh circles are all radial injection, the hole diameter is 0.7mm, the quantity They are 8, 8, 8, 12, 12, and 16, respectively, and the distribution traffic ratios are 11.1%, 11.1%, 11.1%, 16.6%, 16.6%, and 22.2%. The total length of the primary generator is 833mm, the maximum outer diameter is 138mm, and the main material is 304 stainless steel.

Claims (3)

1. A small-sized steam generator is used for high-altitude simulation test research of a small-sized rocket engine and is characterized by consisting of an igniter flame guide pipe (1), an oxygen head (2), a sealing ring (3), a hydrogen head (4), a sealing ring (5), a sealing ring (6), a cooling tail end pressure measuring point (7), a cooling water outer cylinder (8), a cooling water inner cylinder (9), a water inlet (10), a sealing ring (11), a sealing ring (12), a mixing chamber (13) and a mounting flange (14); the medium for generating steam is hydrogen, oxygen and water, and the material is 304 stainless steel; the medium water is used as a medium for generating steam and a cooling liquid of the equipment, and a water-cooling jacket and a spray cooling mixing mode are adopted; the cooling water inner cylinder (9) is provided with 7 rings of injection holes; the first circle is an injection panel and is injected along the axial direction, the aperture is 0.5mm,16 holes are formed, and the distribution flow accounts for 11.3 percent; the second circle to the seventh circle are all radial injection, the aperture is 0.7mm, the number is respectively 8, 12 and 16, the distribution flow rates are respectively 11.1%, 16.6% and 22.2%.

2. The small-sized steam generator according to claim 1, wherein the steam generator head is a tri-coaxial nozzle, the inner side is a hydrogen nozzle, the middle is an oxygen nozzle, and the outermost is a hydrogen nozzle, the igniter head is ignited at the center, after the ignition is finished, the igniter is turned off by oxygen, and the igniter flame guide tube is used as a hydrogen nozzle.

3. The small steam generator as claimed in claim 2, wherein the sealing ring (6) is made of silicon rubber, and the other sealing rings (3), (5), (11) and (12) are made of expanded graphite.

Images