144 results about "Regenerative cooling" patented technology

The present invention discloses a regenerative refrigeration cycle system air conditioner. It includes compressor, condenser, throttle device, evaporator and recuperative heat exchanger. The described recuperative heat exchanger includes a cylindrical tank body whose top portion and bottom portion are respectively equipped with low-pressure refrigerant outlet and inlet connected with compressor suction pipe and evaporator outlet, a straight tube which is placed in the interior of tank body along vertical direction and whose upper and lower ends are respectively connected with condenser outlet and throttle device and a heat-exchanging coiled tube, said coiled tube and straight tube are integrally formed into one body.

The invention relates to a catalytic decomposition low-concentration hydrogen peroxide reactor and a combustion chamber, which solve the problem that in the prior art, price is expensive, safety is not high, freezing point is high, decomposition temperature and ignition temperature are high, purpose is single and the like. A multilayer low-bed-load and pre-contact fine silver net catalysis bed for catalytic decomposition of 40%-70% of hydrogen peroxide is adopted, and service life is greatly prolonged. Radial holes or/and axial holes are arranged on a laryngeal casing of the catalytic decomposition low-concentration hydrogen peroxide reactor for using in underground reactor oil recovery by heating, mining and marine accident self rescuing and a life support system of spaceships and rocket oxidizer storage tank supercharging. The catalytic decomposition low-concentration hydrogen peroxide combustion chamber is provided with a plurality of radial spraying holes for spraying diesel oil or kerosene, an electronic spark plug for ignition, a combustion chamber body with the 40%-70% of hydrogen peroxide serving as a regeneration cooling agent and two kinds of spraying tubes, and the catalytic decomposition low-concentration hydrogen peroxide combustion chamber can be used for thrust chamber gas spraying thrust of a plurality of military projects and road ice and snow removal by heat and crude oil pollution.

A coolant liner for a carbonaceous fuel (coal or petcoke) gasification vessel including a ceramic composite panel and a method of cooling a vessel. The panel includes at least two layers of woven yarns of fibrous material and walls extending between the layers. Accordingly, the layers and the walls define coolant channels that extend in a warp direction. Moreover, one of the layers may be less than about 0.08 inches thick. Materials used to create the composite panel may include alumina, chromia, silicon carbide, and carbon. Additionally, the liners may be shaped in an arc or have coolant channels which vary in diameter in the warp direction. Additionally, the liner may abut a structural closeout of the vessel. The coolant liner provides a significantly more durable component than previously employed liners and is especially well suited to demanding service environments.

A fan-turbine rotor assembly (24) includes a multitude of turbine blades (34) which each define a turbine blade passage which bleed air from a diffuser section (74) to provide for regenerative cooling. Regenerative cooling airflow is communicated from the radial core airflow passage (80) through the diffuser passages (144), through diffuser aspiration passages (146A, 146B) and into the turbine blade passages (150a). The regenerative cooling airflow exits from the turbine blade passage (150a) and transfers received thermal energy into an annular combustor (30). The received thermal energy is recovered at the highest temperature in the cycle.

The invention discloses a liquid-nitrogen cooling system of a novel scramjet engine. The liquid-nitrogen cooling system is combined with the scramjet engine through a heat structure, and the system mainly comprises a liquid nitrogen supply device, a high-pressure air source generation device, an engine casing pipe type heat exchange panel, a high-pressure gas collection chamber and a movable spraying pipe. The liquid-nitrogen system mainly executes three masks including (1) solving the problems in heat dissipation of the scramjet engine; (2) serving as a secondary power device so as to assist a hypersonic vehicle in acceleration and attitude control; and (3) providing low-temperature high-pressure nitrogen for subsystems of cabin environment control, fire prevention and the like. The liquid nitrogen serves as a low-temperature refrigerant so as to have the higher heat sink capacity, the wall face of the engine can be fully cooled, and in the cooling process of the liquid nitrogen, chemical cleavage does not exist; compared with a traditional system, refrigeration cooling is easily achieved; and the reliability and safety of the system are higher. The ultrahigh heat flow of the wall face of the scramjet engine will make the liquid nitrogen to achieve phase changes and expansion sufficiently, and the efficient auxiliary power is provided for an aircraft.

The invention discloses a subsonic velocity combustion ramjet combustion chamber and a regenerative cooling method of the subsonic velocity combustion ramjet combustion chamber. The subsonic velocity combustion ramjet combustion chamber comprises an air inlet segment, a combustion segment and a spray pipe segment. A regenerative cooling structure is arranged inside an outer shell of the combustion segment and the spray pipe segment. The regenerative cooling structure comprises multiple cooling channels. Hydrocarbon fuel cools the combustion chamber through the cooling channels first, and then enters the combustion chamber for combustion. By means of the regenerative cooling method and the cooling structure, the temperature of an engine body can be lowered greatly to be below the allowable temperature of an engine manufacturing material, thermal balance of a whole system can be realized quickly, and therefore the effect of long-time effective thermal protection of the subsonic velocity combustion ramjet combustion chamber is achieved; moreover, the fuel after absorbing heat is higher in combustion efficiency and sufficient in combustion, and therefore the thrust and endurance of a subsonic velocity combustion ramjet can be effectively increased.

A premixing injector for use in gas turbine engines assists in the lean premixed injection of a gaseous fuel/air mixture into the combustor of a gas turbine. The premixing injector is designed to mix fuel and air at high velocities to eliminate the occurrence of flashback of the combustion flame from the reaction zone into the premixing injector. The premixing injector includes choked gas ports, which allow the fuel supply to be decoupled from any type of combustion instability which may arise in the combustor of the gas turbine and internal passages to provide regenerative cooling to the device.

A rocket engine having a combustion chamber, a throat, and an exhaust bell is made with spaced apart inner and outer skins each unitarily formed in one piece of carbon fiber fabric. Longitudinal ribs in the space between the skins reinforce the engine and divide the space into a plurality of flow channels. An oxidizer ring at the bottom of the exhaust bell is in fluid flow communication with the flow channels, and one or more oxidizer tubes are connected tangentially at one end to the ring to supply oxidizer to the ring and thence to the flow channels. The oxidizer tubes are connected at their other end to the engine above the throat, further reinforcing the engine. An igniter is in the combustion chamber, and ignition fuel ports are directed toward the igniter to provide a soft start ignition.

A regeneratively coolable nozzle for a rocket engine is formed by winding a tubular material (6) onto a winding mandrel to produce a helical composite structure (5), through which a coolant can flow during operation of the nozzle. The spiral composite structure (5) is fixed temporarily and the fixed composite structure (5) is removed from the winding mandrel. Then an inner heat resistant, load bearing layer (9) is applied to the radially inner hot-gas facing surface (H) of the fixed composite structure (5). The present nozzle is lightweight and withstands a high coolant pressure.

The invention relates to novel series of hydrogen peroxide thrust chambers used for rockets and airships. The novel series of hydrogen peroxide thrust chambers comprise micro attitude control types, small-sized orbit control types, middle-sized acoustic cavity types, large-sized partition types and ultra-large types; industrial 79.1%-84.9% hydrogen peroxide is used as an oxidizing agent and a regenerative coolant; a non-toxic homogeneous miscible fuel (NHMF), kerosene or liquid hydrogen is taken as a fuel; non-toxic storable components account for 95%-100% of a propellant, so that the use is convenient; the decomposition rate of a catalyst bed is controlled within 75%-95%, the development and service life prolonging of the catalyst bed are facilitated; and novel structures such as a high strength head, a regenerative cooling nineteen-zone partition, a semi-opening acoustic cavity, a gas-liquid impinging injector, a multihole conical shell are adopted. According to the novel series of hydrogen peroxide thrust chambers used for rockets and airships, the combustion temperature, decomposition temperature and regenerative cooling temperature rise are low, so that the working conditions are improved at lot; besides, the density-specific impulse is higher, the propulsive performance is better, and therefore the thrust chambers are applicable to boosters, first-stage and second-stage engines as well as first-stage core engines, which are capable of being used for over 25 times, of novel manned Moon and Mars landing rockets and airships.

The invention discloses a combined type scramjet engine cooling circulation system, and belongs to the technical field of air suction type scramjet engine thermal protection. The system comprises a fuel tank, a fuel pump, a heat exchanger, a first cooling channel, a second cooling channel, a fuel injector and an electromagnetic pump; an annular cavity is formed between the inner wall face and theouter wall face of an engine outer shell and divided into the first cooling channel and the second cooling channel; the fuel tank, the fuel pump, the heat exchanger, the first cooling channel and thefuel injector are sequentially connected through pipelines to form an open cooling circulation system, and kerosene serves as a working medium; and the electromagnetic pump, the second cooling channeland the heat exchanger are sequentially connected through pipelines to form a closed cooling circulation system, and the working medium is liquid metal. According to the combined type scramjet enginecooling circulation system, waste heat of the wall face of an engine combustion chamber is utilized, the advantages of an active regeneration cooling system are reserved, the problems of heat transfer deterioration, cracking coking and the like of a traditional cooling working medium are solved, and an efficient energy management circulating system is constructed.

The invention discloses a novel connecting structure for a head and a regenerative cooling body of a rocket engine. The novel connecting structure for the head and the regenerative cooling body of the rocket engine comprises the head, the regenerative cooling body, a connecting ring and a filter screen. An installation groove is formed in the head in the direction of an injection panel and used for positioning a combustion chamber section of the regenerative cooling body. A first weld joint is arranged on the outer side of the head and used for welding the big end of the connecting ring through a high energy beam. A second weld joint is arranged on the outer side of the inner wall of the combustion chamber section of the regenerative cooling body and used for welding the head through the high energy beam. A third weld joint is arranged on the outer side of the outer wall of the regenerative cooling body and used for argon arc welding of the small end of the connecting ring. The filter screen is fixed to the inner side of the connecting ring in a spot welded mode through a filter framework. A plurality of unthreaded holes are evenly formed in the filter framework. According to the novel connecting structure for the head and the regenerative cooling body of the rocket engine, the number of the weld joints is small, overlapped weld joints are avoided, and the connecting structure is high in reliability; numerical-control welding can be achieved easily, and the weld penetration consistency is good; through the arrangement of the coolant filter screen, the capacity to resist redundant pollutants of the engine is improved; and in addition, the appearance quality of the engine is good, and the expansibility is high.

The invention discloses a direct-current cold-wall type engine combustor. The direct-current cold-wall type engine combustor comprises a combustor upper cover, a combustor linear section, a jet section and a spray pipe convergence and expansion section which are connected in sequence. An oxidizing agent liquid collection cavity, an oxidizing agent jet hole, a fuel liquid collection cavity and a fuel jet hole are formed in the outer wall of the jet section in the circumferential direction. An oxidizing agent enters the oxidizing agent liquid collection cavity via an oxidizing agent regenerativecooling channel and then flows out from the oxidizing agent jet hole to form a jet flow, fuel enters the fuel liquid collection cavity via a fuel regenerative cooling channel and then flows out fromthe fuel jet hole to form a jet flow, the jet flows are close to the inner wall of the combustor linear section but being not in contact with the wall, and the jet flows impact for atomization, mixingand combustion on the combustor upper cover, and are discharged out of the combustor through the spray pipe convergence and expansion section. By means of the combustor, the propellant combustion efficiency and the thermal protection capacity of the combustor can be improved, and the combustor is simple in overall structure and easy to machine and obtain.

The invention discloses a micro-channel regenerative cooling micro-combustor. By the aid of a combustion cavity body, a middle base plate, a micro-channel plate and a top cover plate, the combustion cavity, the middle base plate and the micro-channel plate form a closed combustion cavity, wherein the middle base plate, the micro-channel plate and the top cover plate are sequentially arranged on the upper side and the lower side of the combustion cavity in a laminated manner. Fuel oil flows through the micro-channel plate and then is sprayed into the combustion cavity body through a fuel oil atomizing nozzle, the fuel oil is ignited after mixed with air entering an air inlet, the fuel oil simultaneously serves as a coolant, heat released by the combustor is absorbed by a micro-channel, and the wall of the combustor is cooled while combustion efficiency is improved, so that regenerative cooling is realized. By taking the advantages of large surface area and micro-size effect enhanced heat exchange of the micro-channel, the wall temperature and the temperature gradient of the combustor are reduced, the problem of excessive heat stress is solved, and effective heat protection of the combustor is realized. Besides, preheated fuels are cracked, ignition performance is improved, and extinction limit and combustion efficiency are increased.

The invention discloses a solar heat thruster with high efficiency and high specific impulse, and belongs to the technical field of spacecraft space propulsion. According to the solar heat thruster, the secondary condenser regenerative cooling technology and the laminate heating efficient heat exchange core technology are adopted, a propellant is preheated, cracks caused by hot stress concentration of a secondary condenser are avoided, and the solar utilization rate of a system is improved through laminate heating efficient heat exchange. According to the solar heat thruster, under the same solar incident power, the heating efficiency of the solar heat thruster for the propellant is improved, the heating temperature of the propellant is increased, and the solar heat thruster has the advantages of high efficiency and high specific impulse.

The invention discloses a dividing wall type regenerative cooling air oxygen alcohol torch type igniter which comprises an oxidant shell, a middle bottom, an inner bottom, a cooling jacket, a combustion chamber, a nozzle, a sparking plug, an oxidant inlet pipe mouth and a fuel inlet pipe mouth, wherein oxygen and alcohol are adopted as a propellent, and ignition is carried out by adopting the electric sparking plug. The nozzle comprises a straight-flow nozzle and an eccentric type nozzle, the straight-flow nozzle is an oxidant nozzle, the eccentric nozzle is a fuel nozzle, a cavity from the outlet of the straight-flow nozzle to the outlet of the eccentric nozzle is a reducing chamber; oxidant enters the reducing chamber from the straight-flow nozzle, fuel enters a fuel before-spraying liquid collecting cavity through a regenerating cooling chamber and then rotates through eccentric nozzle tangential holes and enters the reducing chamber, and the oxidant and the fuel are atomized and mixed in the reducing chamber and stably combusted at the outlets of the nozzles. High-temperature fuel is uniformly mixed in the combustion chamber and then sprayed through the throat part of the combustion chamber to form a stable torch. The invention ensures ignition and cooling reliability of an igniter and stable combustion of the torch at the outlet.