An apparatus for simulating high-temperature combustion gas after the decomposition of an aqueous hydrogen peroxide solution

Abstract

The present invention discloses a device for simulating high-temperature combustion gas after the decomposition of an aqueous hydrogen peroxide solution, which comprises a three-component injector, a combustion chamber, and a sonic nozzle arranged coaxially in sequence; the three-component injector includes a hydrogen nozzle, an oxygen nozzle, and a water nozzle; the water nozzle is coaxially installed at the injection end of the combustion chamber, and the water nozzle includes a central through hole, water spray holes, a water collecting cavity, and a water inlet; the water spray holes are arranged circumferentially along the central through hole; one end of the hydrogen nozzle is coaxially inserted into the central through hole of the water spray hole; the other end is coaxially provided with a hydrogen gas collecting cavity; a hydrogen gas spray hole communicated with the hydrogen gas collecting cavity is coaxially arranged in the center of the hydrogen nozzle; the oxygen nozzle includes an oxygen gas collecting cavity and an oxygen gas spray hole; an oxygen gas spray hole is formed between the outer wall surface of the hydrogen nozzle and the inner wall surface of the central through hole. The present invention can realize the catalytic decomposition of hydrogen peroxide simulated by using three components of hydrogen, oxygen, and water, and the flow rates of the three components are adjustable within a certain range, so as to meet the catalytic decomposition of hydrogen peroxide with different concentrations and temperatures.

Description

Technical Field

[0001] The present invention relates to the field of experiments on bipropellant hydrogen peroxide spontaneous combustion engines, and particularly to a device for simulating high-temperature combustion gas after hydrogen peroxide decomposition. Background Art

[0002] Liquid rocket engines are the main power devices for aerospace systems such as launch vehicles, space shuttles, and space vehicles. Considering indicators such as thrust, specific impulse, and reliability, the propellants of current rocket engines basically use highly toxic propellants such as N 2 O 4 / hydrazine, monomethylhydrazine, unsymmetrical dimethylhydrazine, or cryogenic and non-easily storable propellants such as liquid oxygen / liquid hydrogen, hydrocarbon compounds, etc. With the development of aerospace technology and the increasing requirements for environmental protection and human health, it is an inevitable trend for aerospace power systems to use non-toxic and non-polluting propellants in the future.

[0003] Hydrogen peroxide has the advantages of high density specific impulse, non-toxic and pollution-free, high specific heat, storable at room temperature, single decomposition, spontaneous combustion, etc., and is very suitable as an oxidizer for modern rocket engines. Green spontaneous combustion propellants represented by hydrogen peroxide are increasingly favored by people. In future aerospace development, hydrogen peroxide engines will surely be more and more widely used.

[0004] Hydrogen peroxide undergoes an exothermic decomposition reaction under catalytic action:

[0005] 2H 2 O 2 →2H 2 O + O 2

[0006] Compared with other non-toxic and non-polluting propellants, when hydrogen peroxide is used as an oxidizer, a large amount of heat can be released during the decomposition process, and a spontaneous combustion reaction can occur with the fuel, simplifying the ignition process. As long as the key technologies for their spontaneous ignition are solved, the oxidizer of the propellant and the characteristics of non-toxicity, storable, and spontaneous combustion required by the oxidizer can be organically combined to give full play to the performance of the propellant as much as possible, which has great popularization and application value.

[0007] The catalytic decomposition of hydrogen peroxide is one of the multi-component spontaneous combustion engine schemes: hydrogen peroxide is first catalytically decomposed into high-temperature combustion gas, and then sprayed into the combustion chamber together with the fuel, and the high-temperature combustion gas and the fuel undergo a spontaneous combustion reaction. In practical applications, most of the catalytic decomposition schemes of hydrogen peroxide are catalytic bed catalysis: the catalyst is placed in a container, and hydrogen peroxide is allowed to flow through the catalyst to catalyze its decomposition. According to the different catalysts in the catalytic bed, it can be divided into: granular catalytic bed catalysis and metal catalytic mesh catalysis.

[0008] To explore the performance of a hydrogen peroxide engine, tests need to be carried out at different concentrations, temperatures, pressures, and flow rates. This not only places requirements on the propulsion system but also poses higher demands on the performance of the catalytic bed. The design of an ordinary catalytic bed is difficult to meet all the requirements. The design parameters of the catalytic bed are complex and there is little reference. A large amount of research on the catalytic bed needs to be carried out before the test, which raises the threshold for studying the internal combustion flow field of the engine.

[0009] Existing technical solutions for hydrogen peroxide engines are all based on the combustion of hydrogen peroxide decomposed by the catalytic bed and fuel in the combustion chamber, which have relatively high requirements for test conditions and are not conducive to carrying out tests.

[0010] Using three components of hydrogen, oxygen, and water to simulate the hydrogen peroxide decomposition process, enabling these three components to react first in the combustion chamber, and the temperature and component ratio of the high-temperature gas after the reaction are kept consistent with those after the complete decomposition of hydrogen peroxide, providing high-temperature gas for the bi-component engine. This simplifies the hydrogen peroxide catalytic process, reduces the complex catalytic bed design process, eliminates the uncertainties brought by various factors during the catalytic process, and provides a solution and approach for studying the combustion performance of bi-component engines.

[0011] As long as the key technologies for their spontaneous ignition are solved, the oxidizer of the propellant and the non-toxic, storable, and self-ignitable characteristics required by the oxidizer can be organically combined, maximizing the performance of the propellant, which has great value for popularization and application.

[0012]

[0013] Existing hydrogen peroxide catalytic technologies are all based on catalytic beds composed of various catalysts, and no method for simulating the catalytic process using other components has been proposed. The performance of the catalytic bed directly affects the performance of the engine. With the emergence of more new catalysts, their catalytic performance still needs further research and exploration. Summary of the Invention

[0014] The technical problem to be solved by the present invention is aimed at the deficiencies of the above-mentioned existing technologies, and provides a device for simulating high-temperature gas after hydrogen peroxide decomposition. This device for simulating high-temperature gas after hydrogen peroxide decomposition can realize the simulation of the catalytic decomposition of hydrogen peroxide using three components of hydrogen, oxygen, and water, and the flow rates of the three components are adjustable within a certain range, so as to meet the simulation of the catalytic decomposition of hydrogen peroxide with different concentrations and temperatures.

[0015] To solve the above technical problems, the technical solution adopted by the present invention is:

[0016] A device for simulating high-temperature gas after hydrogen peroxide decomposition, comprising a three-component injector, a combustion chamber, and a sonic nozzle arranged coaxially in sequence.

[0017] The triple-component injector includes a hydrogen nozzle, an oxygen nozzle, and a water nozzle.

[0018] The water nozzle is coaxially installed at the injection end of the combustion chamber. The water nozzle includes a central through-hole, water injection holes, a water collection chamber, and a water inlet.

[0019] The central through-hole is coaxially arranged at the center of the water nozzle.

[0020] There are several water injection holes, which are arranged circumferentially along the central through-hole; each water injection hole is connected to the water inlet through the water collection chamber.

[0021] One end of the hydrogen nozzle is coaxially inserted into the central through-hole of the water injection hole; the other end of the hydrogen nozzle is coaxially provided with a hydrogen gas collection chamber for storing hydrogen gas; a hydrogen gas injection hole connected to the hydrogen gas collection chamber is coaxially arranged at the center of the hydrogen nozzle.

[0022] The oxygen nozzle includes an oxygen gas collection chamber and an oxygen gas injection hole.

[0023] The oxygen gas collection chamber is coaxially and sealedly arranged between the hydrogen gas collection chamber and the water nozzle for storing oxygen gas.

[0024] The oxygen gas injection hole is formed between the outer wall surface of the hydrogen nozzle inserted into the central through-hole and the inner wall surface of the central through-hole.

[0025] Let the number of water injection holes be 2n, where n≥1; then the 2n water injection holes form n groups of colliding water injection holes evenly arranged circumferentially along the central through-hole; the intersection points of the two water injection holes in each group of colliding water injection holes are all located on the central axis of the combustion chamber.

[0026] The diameter of each water injection hole is 0.6 - 2.5 mm.

[0027] The impact angle α between the two water injection holes in each group of colliding water injection holes is 45 - 120°.

[0028] A pressure measuring hole is provided on the combustion chamber, and a pressure sensor is installed in the pressure measuring hole.

[0029] A temperature measuring hole is provided on the combustion chamber, and a temperature sensor is installed in the temperature measuring hole.

[0030] The temperature sensor can be used to detect the temperature of the high-temperature gas after the combustion of the triple-component hydrogen, oxygen, and water in the combustion chamber; according to the temperature of the high-temperature gas, the injection amount of the triple-component propellant is adjusted, so as to simulate the decomposition process at different hydrogen peroxide concentrations and temperatures.

[0031] The triple-component injector, the combustion chamber, and the sonic nozzle are all connected in a sealed and detachable manner.

[0032] The present invention has the following beneficial effects:

[0033] 1. The present invention can utilize the combustion reaction of hydrogen, oxygen and water to simulate the high-temperature gas after the decomposition of hydrogen peroxide at different concentrations, reduce the test limitations of the catalytic bed performance on the hydrogen peroxide spontaneous combustion engine, and flexibly conduct research on the internal combustion flow field structure of the engine. The present invention can replace the process of hydrogen peroxide catalytic decomposition in ground experiments, providing very convenient conditions for studying the reaction between the high-temperature gas after hydrogen peroxide decomposition and various fuels. In addition, oxygen and hydrogen are coaxial direct-current shear nozzles, and water is multiple pairs of colliding in the outer ring.

[0034] 2. The high-temperature gas exported by the present invention can spontaneously combust with other fuels, thereby organically combining the oxidizer of the propellant and the non-toxic, storable and self-ignitable characteristics required by the oxidizer, maximizing the performance of the propellant, and having great popularization and application value.

[0035] 3. The solution of the present invention is simple, eliminating the complex performance exploration and structural design of the catalytic bed. The propellant used in the simulation is very common in rocket engine tests, and the propulsion system does not require special design.

[0036] 4. The present invention does not need to change the temperature of the reactants, and only needs to change the ratio of the three components to simulate the decomposition process of hydrogen peroxide at different concentrations and temperatures.

[0037] 5. The present invention can reduce the test cost, simplify the complex catalytic process of hydrogen peroxide and the use of expensive catalysts.

[0038] 6. The present invention does not directly use high-concentration hydrogen peroxide solution, reducing the requirements for the test pipeline, reducing the number of pre-test cleanings of the test pipeline, reducing the test preparation time, and improving the test efficiency;

[0039] 7. The present invention can improve the safety of the test and prevent the probability of accidental explosion and fire due to hydrogen peroxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 Shows a schematic structural diagram of a device for simulating high-temperature gas after hydrogen peroxide decomposition according to the present invention.

[0041] Figure 2 Shows a schematic plan layout diagram of the colliding water spray holes in the present invention.

[0042] Figure 3 Shows Figure 2 The B-B sectional view in

[0043] Figure 4 Shows Figure 2 The A-A sectional view in

[0044] Among them:

[0045] 1. Oxygen gas collecting chamber; 2. Hydrogen gas collecting chamber; 3. Hydrogen fixing bolt; 4. Hydrogen DC nozzle; 5. Hydrogen nozzle gasket; 6. Water nozzle; 7. Combustion chamber; 8. Sonic nozzle; 9. Spark plug; 10. First fixing bolt; 11. Second fixing bolt; 12. First gasket; 13. Second gasket; 14. Pressure measuring hole; 601. Opposing water spray holes; 602. Central through hole. Detailed implementation manners

[0046] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred implementation manners.

[0047] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "left side", "right side", "upper part", "lower part", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not represent the importance of components, so it cannot be understood as a limitation to the present invention. The specific dimensions adopted in this embodiment are only for illustrating the technical solution by way of example and do not limit the protection scope of the present invention.

[0048] As Figure 1 shown, a device for simulating high-temperature combustion gas after hydrogen peroxide decomposition includes a three-component injector, a combustion chamber 7, and a sonic nozzle 8 arranged coaxially in sequence.

[0049] Furthermore, the connections between the three-component injector, the combustion chamber, and the sonic nozzle are all sealed and detachable. In this embodiment, preferably, the connections between the three are all sealed and detachable through fixing bolts and gaskets. Among them, the connection between the three-component injector and the combustion chamber is preferably sealed and detachable through the first fixing bolt 10 and the first gasket 12. The connection between the combustion chamber 7 and the sonic nozzle 8 is preferably sealed and detachable through the second fixing bolt 11 and the second gasket 13.

[0050] The three-component injector includes a hydrogen nozzle, an oxygen nozzle, and a water nozzle 6.

[0051] The water nozzle preferably has a disc shape and is coaxially installed at the injection end of the combustion chamber. As Figure 2 , Figure 3 and Figure 4 shown, the water nozzle includes a central through hole 602, water spray holes, a water collecting chamber, and a water inlet.

[0052] The central through hole is coaxially arranged at the center of the water nozzle.

[0053] There are several water spray holes arranged along the circumference of the central through hole; each water spray hole is connected to the water inlet through the water collecting chamber. Assuming the number of water spray holes is 2n, where n≥1, in this embodiment, preferably n=4; then the 2n water spray holes form n groups of colliding water spray holes 601 uniformly arranged along the circumference of the central through hole; the intersection point of the two water spray holes in each group of colliding water spray holes is located on the central axis of the combustion chamber. Further, the diameter of each water spray hole is preferably 0.6-2.5mm.

[0054] The impact angle α of the two water spray holes in each group of colliding water spray holes is set between 45-120 degrees. The water spray nozzles are outside the hydrogen and oxygen, which is beneficial to the cooling of the combustion chamber wall and the mixing of water and post-combustion products.

[0055] The hydrogen nozzle is preferably a hydrogen direct current nozzle 4, one end of which is coaxially inserted into the central through hole of the water spray hole; a hydrogen collecting chamber 2 is coaxially arranged at the other end of the hydrogen nozzle, and the hydrogen collecting chamber is used to store hydrogen; a hydrogen spray hole connected to the hydrogen collecting chamber is coaxially arranged at the center of the hydrogen nozzle.

[0056] The oxygen nozzle comprises an oxygen collecting chamber 1 and an oxygen spray hole.

[0057] The oxygen collecting chamber is coaxially sealed and arranged between the hydrogen collecting chamber and the water nozzle for storing oxygen.

[0058] Furthermore, the oxygen collecting chamber is preferably in the form of a cover. On the one hand, the end cover is preferably sealed and installed with the hydrogen nozzle at the end facing away from the combustion chamber through the hydrogen nozzle sealing gasket 5; on the other hand, it is also sealed and detachably connected to the hydrogen collecting chamber through the hydrogen nozzle sealing gasket 5 and the hydrogen fixing bolts 3.

[0059] An oxygen injection hole is formed between the outer wall surface of the hydrogen nozzle inserted in the central through hole and the inner wall surface of the central through hole.

[0060] The combustion chamber is provided with a spark plug 9, a pressure measuring hole 14 and a temperature measuring hole.

[0061] A pressure sensor is installed in the pressure measuring hole to monitor the gas pressure in the combustion chamber.

[0062] A temperature sensor is installed in the temperature measuring hole, and the temperature sensor can be used to detect the temperature of the high-temperature combustion gas after the three components of hydrogen, oxygen and water are burned in the combustion chamber.

[0063] Furthermore, the temperature sensor is preferably arranged at the rear section of the combustion chamber, close to the outlet, to measure the temperature of the fuel gas at the rear section of the combustion reaction.

[0064] Oxygen, hydrogen, and water enter the combustion chamber through the inlets on the injector, where they are mixed and burned. Then, they pass through a sonic nozzle as the high-temperature gas components after decomposition in a hydrogen peroxide bipropellant engine. The combustion chamber is the main location where the combustion reaction of each component occurs. The cylindrical combustion chamber scheme is adopted, and the inner surface is cylindrical. The high-temperature gas in the combustion chamber finally exits through the sonic nozzle. The inner surface of the sonic nozzle converges first and then diverges, which can effectively isolate the influence of downstream pressure fluctuations on the inside of the combustion chamber.

[0065] Furthermore, the present invention can adjust the injection amounts of the three-component propellant according to the temperature of the high-temperature gas, thereby being able to simulate the decomposition processes at different hydrogen peroxide concentrations and temperatures.

[0066] A method for simulating high-temperature gas after the catalytic decomposition of hydrogen peroxide includes the following steps.

[0067] Step 1: Select the mass fraction A of hydrogen peroxide, the temperature Tp, and the catalytic decomposition pressure P in the hydrogen peroxide aqueous solution to be simulated. The value range of A is 60%-100%, and Tp and P are freely selected according to the usage conditions of the hydrogen peroxide aqueous solution.

[0068] Step 2: Calculate the mass fractions of oxygen and water vapor and the mixture temperature in the mixture formed after the complete decomposition of the hydrogen peroxide aqueous solution with a hydrogen peroxide mass fraction of A when the decomposition ambient pressure drop is P. The mass fractions of oxygen and water vapor are denoted as B and 1 - B respectively, and the temperature of the oxygen and water vapor mixture is denoted as T0.

[0069] Take the molecular weights of hydrogen peroxide and water as 34 and 18 respectively. Then, the chemical reaction formula for the complete decomposition of the hydrogen peroxide aqueous solution with a hydrogen peroxide mass fraction of A is as shown in formula (1).

[0070]

[0071] In this way, when the decomposition ambient pressure drop is P, the mass fraction B of oxygen and the mass fraction (1 - B) of water vapor in the products of the complete decomposition of the hydrogen peroxide aqueous solution with a hydrogen peroxide mass fraction of A, as well as the decomposition product temperature T0, can be calculated. Among them, B corresponds one-to-one with A and is calculated through formula (2), while T0 is jointly determined by A, Tp, and P.

[0072]

[0073] Step 3: Calculate the mass ratio C of normal-temperature oxygen and hydrogen such that the oxygen and water vapor mass fractions in the combustion products of oxygen and hydrogen at mass ratio C are exactly the same as those in the decomposition products of the hydrogen peroxide aqueous solution with mass fraction A in Step 2. When normal-temperature oxygen and hydrogen react fully according to formula (3), there is a uniquely determined C (C > 8) such that the products of formula (3) have exactly the same oxygen and water vapor mass fractions as the decomposition products of the hydrogen peroxide aqueous solution with mass fraction A in Step 2.

[0074]

[0075] It can be seen that C corresponds one-to-one with A and is calculated through formula (4).

[0076]

[0077] The initial temperatures of normal-temperature oxygen and hydrogen are denoted as Ty and Tq respectively. Given Ty and Tq, the temperature T1 of the products of the full reaction of normal-temperature oxygen and hydrogen at mass ratio C and pressure P can be calculated; according to the calculation results, T1 > T0.

[0078] Step 4: Add normal-temperature oxygen and normal-temperature liquid water to the products in Step 3 and mix them fully to form a new oxygen and water vapor mixture. As shown in formula (5), the mass ratio of the added normal-temperature oxygen to normal-temperature liquid water is the same as the mass ratio of oxygen to water vapor in the decomposition products of the hydrogen peroxide aqueous solution with mass fraction A in Step 2, both being B:(1 - B); such that the oxygen and water vapor mass fractions in the new mixture generated in this step are B and 1 - B respectively; denote the mass ratio of the products in Step 3 (high-temperature oxygen and water vapor mixture) to the additives in this step (normal-temperature oxygen and normal-temperature liquid water with a mass ratio of B:(1 - B)) as x. Denote the temperature of normal-temperature liquid water as Tsl.

[0079]

[0080] Combine the two terms of normal-temperature oxygen on the left side of formula (5) into one term and organize it into formula (6). In formula (6), the reactants are normal-temperature oxygen, normal-temperature hydrogen, and normal-temperature liquid water, and the reaction coefficients of these three components are jointly determined by A and x.

[0081]

[0082] From the above steps 1 - 4, it can be seen that for any selected A, given Tp, P, Ty, Tq, and Tsl, T0, T1, B, and C can be uniquely determined. Among them, T0 and T1 are obtained through thermodynamic calculation methods, and B and C are calculated by formulas (2) and (4) respectively. Since the temperatures of normal-temperature oxygen and normal-temperature liquid water are both less than T0, that is, Ty < T0 and Tsl < T0, while T1 > T0, a unique x = D can be calculated such that the temperature of the newly generated mixture in this step is equal to T0.

[0083] Using the above method, the calculation results of the hydrogen peroxide decomposition process are as follows:

[0084] Table 1 Decomposition results of hydrogen peroxide with different concentrations and temperatures

[0085]

[0086] Given A, Tp, P, Ty, Tq, and Tsl, D is calculated through step 5.

[0087] Step 5, calculate D. The specific calculation method includes the following steps:

[0088] Step 5A: Set the initial value of D as x;

[0089] Step 5B: After calculating the reaction coefficients of the three components according to formula (6), use thermodynamic calculation to obtain the gas temperature Tx after the reaction of the three components;

[0090] Step 5C: Gas temperature judgment: Determine the gas temperature Tx and the temperature T0 calculated in step 2;

[0091] Step 5D: Calculate the optimal x value: When the temperature Tx and the temperature T0 are equal or the difference is within the set threshold range, then the x value at this time is considered as D; otherwise, adjust the x value and repeat steps 5B to 5D until the optimal D value is obtained;

[0092] After calculating the D value, formula (6) is denoted as formula (7).

[0093]

[0094] The reaction coefficients of normal-temperature oxygen, normal-temperature hydrogen, and normal-temperature liquid water in formula (7) are calculated from A and D. When these three components are fully combusted according to this reaction coefficient, the components, contents, temperatures, and pressures of the products are exactly the same as those of the products after the full decomposition of the hydrogen peroxide aqueous solution with a mass fraction of A selected in step 1.

[0095] Step 6: Obtain three sets of propellant ratios: Substitute A and D into the coefficients before each component in formula (7), and then obtain the reaction ratio values of hydrogen, oxygen, and water in the three-component propellant at the initial temperature Tp.

[0096] The reaction ratio values of hydrogen, oxygen, and water in the above three-component propellant at the initial temperature Tp are molar ratios or mass fraction ratios.

[0097] The present invention uses hydrogen, oxygen, and water to simulate the above results. The initial temperatures Ty, Tq, and Tsl of the three components are all 300K, and the simulation results are shown in Table 2 below:

[0098] Table 2 Results of Simulating Hydrogen Peroxide Decomposition with Three Components

[0099]

[0100] The present invention uses three components to simulate the complete decomposition products of hydrogen peroxide. Without changing the temperature of the reactants, by changing the ratios of the three components, the decomposition results of hydrogen peroxide with different concentrations and temperatures can be simulated.

[0101] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all fall within the protection scope of the present invention.

Claims

1. A device for simulating high-temperature gas after hydrogen peroxide decomposition, characterized in that: it includes a three-element injector, a combustion chamber, and a sonic nozzle arranged coaxially in sequence; the three-element injector includes a hydrogen nozzle, an oxygen nozzle, and a water nozzle; the water nozzle is coaxially installed at the injection end of the combustion chamber, and the water nozzle includes a central through hole, water spray holes, a water collection cavity, and a water inlet; the central through hole is coaxially arranged in the center of the water nozzle; there are several water spray holes, which are arranged circumferentially along the central through hole; each water spray hole is connected to the water inlet through the water collection cavity; one end of the hydrogen nozzle is coaxially inserted into the central through hole of the water spray hole; the other end of the hydrogen nozzle is coaxially provided with a hydrogen gas collection cavity for storing hydrogen gas; a hydrogen gas spray hole connected to the hydrogen gas collection cavity is coaxially arranged in the center of the hydrogen nozzle; the oxygen nozzle includes an oxygen gas collection cavity and an oxygen gas spray hole; the oxygen gas collection cavity is coaxially and hermetically arranged between the hydrogen gas collection cavity and the water nozzle for storing oxygen gas; the oxygen gas spray hole is formed between the outer wall surface of the hydrogen nozzle inserted into the central through hole and the inner wall surface of the central through hole.

2. The device for simulating high-temperature gas after hydrogen peroxide decomposition according to claim 1, characterized in that: let the number of water spray holes be 2n, where n≥1; then the 2n water spray holes form n groups of colliding water spray holes evenly arranged circumferentially along the central through hole; the intersection points of the two water spray holes in each group of colliding water spray holes are all located on the central axis of the combustion chamber.

3. The device for simulating high-temperature gas after hydrogen peroxide decomposition according to claim 2, characterized in that: the diameter of each water spray hole is 0.6 - 2.5 mm.

4. The device for simulating high-temperature gas after hydrogen peroxide decomposition according to claim 2, characterized in that: the impact angle α between the two water spray holes in each group of colliding water spray holes is 45 - 120°.

5. The device for simulating high-temperature gas after hydrogen peroxide decomposition according to claim 1, characterized in that: a pressure measuring hole is provided on the combustion chamber, and a pressure sensor is installed in the pressure measuring hole.

6. The device for simulating high-temperature gas after hydrogen peroxide decomposition according to claim 1, characterized in that: a temperature measuring hole is provided on the combustion chamber, and a temperature sensor is installed in the temperature measuring hole.

7. The device for simulating high-temperature gas after hydrogen peroxide decomposition according to claim 6, characterized in that: the temperature sensor can be used to detect the temperature of the high-temperature gas after the combustion of the three-element hydrogen, oxygen, and water in the combustion chamber; according to the temperature of the high-temperature gas, the injection amount of the three-element propellant is adjusted, so as to be able to simulate the decomposition process at different hydrogen peroxide concentrations and temperatures.

8. The device for simulating high-temperature gas after hydrogen peroxide decomposition according to claim 1, characterized in that: the connections between the three-element injector, the combustion chamber, and the sonic nozzle are all sealed and detachable.

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