7results about How to "Efficient blending" patented technology

The invention provides a dual-fuel combustion nozzle which comprises a nozzle shell connected with a cooling plate. A hydrogen fuel gas collecting cavity and a liquid hydrocarbon fuel pipe which are coaxial are arranged in the nozzle shell; a first air channel is formed between the inner wall of the hydrogen fuel gas collecting cavity and the liquid hydrocarbon fuel pipe, and a swirler is arranged in the first air channel; a second air channel is formed between the outer wall of the hydrogen fuel gas collecting cavity and the inner shell of the nozzle shell; a liquid hydrocarbon spray hole is formed in the outlet end of the liquid hydrocarbon fuel pipe and is positioned in a space formed by the expansion section of the venturi structure; a hydrogen spray hole is formed in the side wall, close to the top end, of the hydrogen fuel collecting cavity. The invention further provides an engine combustion chamber comprising the combustion nozzle. According to the invention, efficient mixing of hydrocarbon fuel and hydrogen fuel can be realized, the phenomenon of backfire spontaneous combustion is avoided, the flameout boundary is widened, and stable switching of multiple working modes is realized.

This invention discloses a concave cavity flame stabilizer structure, its fuel injection and cooling method, and an afterburner. The structure includes a symmetrical Tesla valve, a fluid oscillator, and shape memory alloy ribs. The Tesla valve is located at the front end of the evaporation chamber of the afterburner, utilizing its unidirectional flow resistance characteristics to suppress fuel backflow caused by pressure fluctuations and ensure stable fuel supply. The fluid oscillator replaces the traditional injection hole, converting the fuel-air mixture into a high-frequency, large-scale periodic swept jet injected into the concave cavity, improving atomization, evaporation, and mixing efficiency. The shape memory alloy ribs are located on the cold side of the bottom and rear wall of the concave cavity, automatically adjusting their shape according to changes in wall temperature to achieve dynamic matching between cooling intensity and heat load. This invention, through the system integration of fuel supply, combustion, and cooling, solves the problems of fuel backflow, low atomization efficiency, and poor adaptability of the cooling system under wide operating conditions in traditional concave cavity structures, significantly improving the combustion efficiency and thermal protection reliability of the afterburner.

A design method of an axisymmetric bending detonation engine relates to a hypersonic velocity detonation engine of an aircraft, and comprises the following steps: 1) selecting and correcting a von Karman curve as a generatrix, and rotating around a symmetric axis to generate an axisymmetric precursor; 2) determining the inlet position and shape of the air inlet channel; (3) the inlet shape is translated backwards by a proper distance to form an inlet section of the air inlet channel; 4) designing an S-shaped curve beneficial to fuel mixing and gas compression, and installing a fuel spraying device behind the S-shaped curve; 5) reversely designing a wall surface for generating a bending detonation wave; 6) designing an engine exhaust nozzle; 7) selecting and arranging a plurality of engine channels; and (8) designing an outer cover, a connecting plate and other related parts of the air inlet channel, and completing the overall design of the whole engine. The design method is simple and easy to implement, and the performance of the detonation engine can be remarkably improved by improving the displacement effect of the boundary layer and the mixing efficiency of the fuel. The flexible selection of the number of the channels can meet different thrust requirements, so that the method has great potential in engineering application.

The utility model discloses an atomization testing device special for an injector. The atomization testing device comprises a cart, a silencer and a testing assembly. The testing assembly has two paths, namely an oxygen path assembly and a combustion path assembly; the oxygen path assembly comprises an oxygen path pressure storage tank, an oxygen path pressure controller, an oxygen path pressure gauge, an oxygen path flowmeter, an oxygen path filter, an oxygen path safety valve and an oxygen path funnel; the combustion path assembly comprises a combustion path pressure storage tank, a combustion path pressure controller, a combustion path pressure gauge, a combustion path flowmeter, a combustion path filter, a combustion path safety valve and a combustion path funnel. Deionized water is used as a propellant working medium, an oxygen path and a combustion path are simulated, the front pressure of the injector is changed by adjusting the pressure controller, the flow of the deionized water passing through the injector is measured through the flow meter, the atomization state is photographed and recorded, and the relation between the flow of the deionized water of the injector and the pressure drop is measured. The pressure drop under the rated deionized water flow is obtained, and the flow, the pressure drop and the atomization effect of the injector are tested and verified at the same time.

A gas generator is composed of an injector, an eccentric spoiler ring, a spherical cone combustion chamber and a three-way elbow, wherein the injector is in a round cake shape and is printed by a 3D printer as a whole, the upper half of the eccentric spoiler ring is a cylindrical ring, the top surface of the cylindrical ring is fixedly connected to the bottom edge of the lower boss of the injector by welding, the bottom edge of the side of the cylindrical ring is fixedly connected to the side hole wall of the spherical cone combustion chamber by welding, and the lower half of the eccentric spoiler ring is an open eccentric conical ring; the spherical cone combustion chamber includes a spherical cavity and a conical cavity, wherein the side of the spherical cavity is provided with a side hole, the top of the conical cavity is provided with an outlet, the outlet is fixedly connected to the middle inlet of the three-way elbow by welding, the three-way elbow is in a side T-shape as a whole, the left side of the three-way elbow is a left port, which adopts a flange structure connection form, the right side is a right port, the middle part is a middle inlet, which adopts a boss positioning form. The present invention optimizes the structure of the gas generator, can make the propellant efficiently atomized, mixed and burned, and improves the combustion efficiency.

The invention discloses an Ilex cornuta leaf-shaped turbulent flow element and an enhanced heat exchange tube, and belongs to the technical field of heat exchange equipment. The turbulent flow element comprises holly leaf-shaped turbulent flow pieces, and the turbulent flow pieces are welded and fixed through adjacent thorn teeth to form an axial through type fluid channel in a surrounding mode. Each spoiler comprises a leaf-shaped base body and bionic spoiler thorns, and sharp thorn teeth are arranged at the two radial ends and the two axial sides of each spoiler. Bionic turbulent flow thorns are obliquely distributed on the outer turbulent flow face at equal intervals, each bionic turbulent flow thorn is composed of two wing-shaped blades, the front edges of the wing-shaped blades are blunt, the rear edges of the wing-shaped blades are in a thorn shape, and notches are formed between the blades. Overflowing holes are formed in the central axis of the leaf-shaped base body at intervals, and the edges of the overflowing holes are bent to form turbulent flow tongue pieces. And a plurality of turbulent flow elements are arranged in the enhanced heat exchange tube in series. Through bionic configuration, turbulence is stably generated within a wide Reynolds number range, radial circulation force is enhanced, and collaborative optimization of heat transfer enhancement and resistance reduction is achieved.