72results about How to "Reduce flow loss" patented technology

The plunger pump system with the cooling device comprises a plunger pump body and the cooling device, the plunger pump body comprises a plunger pump cylinder body, a plunger, a lining, a sealing assembly and a cooling flow channel, and the cooling flow channel is arranged in the plunger pump cylinder body; the cooling device comprises a liquid storage tank, a circulating pump and a heat exchanger; the circulating pump comprises a volute, an impeller and a rotating shaft; the impeller comprises a rear cover plate, a front cover plate, blades and a balance hole; the impeller is characterized in that a balance jet device is installed in the balance hole and used for enabling high-pressure liquid on the back pressure side of the impeller to flow back into the impeller cavity through the balance jet device, and the jet angle of the balance jet device can be adjusted. According to the circulating pump, the axial force can be balanced, and meanwhile, secondary flow and flow loss at the blade inlets can be reduced, so that the hydraulic performance and efficiency of the circulating pump can be improved, the plunger pump cylinder body can be efficiently cooled, the operation stability of the plunger pump is improved, and the service life of the plunger pump is prolonged.

The invention discloses a gas mixing tank for realizing uniform mixing of hydrogen and natural gas and a design method, and relates to the technical field of natural gas hydrogen doping, the gas mixing tank comprises a tank body and at least two mixing units, all the mixing units are stacked in the tank body, and the gas passing directions of every two adjacent mixing units are different. According to the hydrogen and natural gas mixing device, the multiple mixing units are arranged in the tank body in the stacked mode, the gas passing directions of every two adjacent mixing units are different, when the gas passing directions are different, natural gas and hydrogen are promoted to be mixed in a crossed mode, uniform mixing of the hydrogen and the natural gas is achieved, and the flowing loss of the gas in the flowing process is reduced.

The present invention relates to the technical field of silencers, and in particular to a sheet-type silencer, comprising: a silencer sheet, and a silencer outer shell, wherein the silencer outer shell is suitable for accommodating at least two silencer sheets at intervals, and an airflow channel is formed between the two silencer sheets; the silencer sheet comprises: a silencer sheet outer shell, which is at least partially composed of a perforated plate, and is composed of at least two perforated plates with different perforation rates; and a sound-absorbing material, wherein the sound-absorbing material is uniformly filled inside the silencer sheet outer shell. The sheet-type silencer provided by the present invention makes the silencer sheet outer shell composed of at least two perforated plates with different perforation rates, and adopts different perforation rates to silence different frequency spectrum parts of the noise source, thereby achieving the best overall sound reduction under the same pressure loss conditions.

The invention provides a design method of an asymmetric guide vane diffuser for a centrifugal compressor, and belongs to the technical field of distributed new energy and aviation power. The method comprises the steps that the basic size and shape of the diffuser are determined based on the outlet airflow condition of the centrifugal compressor; according to the connecting mode of the diffuser and the volute, the design requirement of the asymmetric guide vane is determined; according to the number of the blades, the numbers and initial positions of the blades are determined, and according to airflow conditions and blade outlet boundary requirements, the angles and the positions of the blades are adjusted; based on the preliminary design, geometric parameters of the blade are calculated, and the geometric parameters comprise the trailing edge distance, the included angle and the mean camber line coordinate; and gradually optimizing the geometric parameters through an iterative calculation method. Through iterative optimization and CFD simulation, the aerodynamic performance of the diffuser can be remarkably improved, the flow loss is reduced, and the overall efficiency of a gas compressor is improved.

The invention discloses a two-stage screw air compressor. The air compressor comprises a first-stage rotor assembly, a first-stage driving motor, a second-stage rotor assembly, a flow guide part and a second-stage driving motor. The first-stage rotor assembly comprises a first-stage machine body, a first-stage male rotor and a first-stage female rotor; the first-stage male rotor and the first-stage female rotor are arranged in the first-stage machine body; a first air inlet is formed in the top of the first-stage machine body; the first-stage driving motor is connected with the first-stage male rotor; the second-stage rotor assembly is arranged on the rear side of the first-stage rotor assembly and comprises a second-stage machine body, a second-stage male rotor and a second-stage female rotor. The second-stage male rotor and the second-stage female rotor are arranged in the second-stage machine body; a second air inlet is formed in the bottom of the second-stage machine body; the flow guide piece is connected with the first gas outlet and the second gas inlet and forms a gas flow channel; and the second-stage driving motor is connected with the second-stage male rotor. Through the arrangement, when the air compressor operates, the flow loss of air is lower, and the compression efficiency is higher.

The invention relates to a high-temperature alloy solid blade wax mold reversible deformation tool design method, belongs to the technical field of precision casting, and solves the problems that the correction precision is limited during reversible deformation of an existing blade wax mold; and a specific, simple and standardized blade wax mold reversible deformation method does not exist. The invention provides a specific, simple and standardized blade wax mold reversible deformation method, which comprises the following steps: firstly, analyzing according to a cross section to obtain a blade body size deformation rule, then designing a blade wax mold reversible deformation tool according to the deformation rule, and finally, carrying out reversible deformation on the blade wax mold by virtue of the tool. According to the method, the deformation difference between the air inlet and exhaust edges of the blade wax mold and the middle of the blade body is considered, cracks on the air inlet and exhaust edges of the blade wax mold are avoided, the correction precision is improved, and the purpose of effective deformation is achieved.

This invention provides a pump body assembly for a compressor and a compressor. The pump body assembly includes: a first cylinder with a suction channel, comprising a main channel and a branch channel, the axis of the main channel being inclined relative to the axis of the compressor; a connecting channel on a partition member, the axis of the connecting channel being inclined relative to the axis of the compressor; and an intake channel on a second cylinder, the axis of the intake channel being inclined relative to the axis of the compressor. The main channel, the connecting channel, and the intake channel are sequentially connected. The intake end of the main channel is located on the side of the first cylinder and / or on the end face of the first cylinder facing away from the partition member. The intake channel communicates with the chamber of the second cylinder, and the branch channel connects the main channel and the chamber of the first cylinder. The technical solution of this invention solves the problem of high suction resistance in the second cylinder of the compressor in the prior art, which leads to reduced overall energy efficiency.

The invention provides an indoor unit of an embedded air conditioner and the embedded air conditioner. The indoor unit comprises an indoor fan, an air inlet is formed in the lower side of the indoor fan, and an air outlet is formed in the periphery of the indoor fan; the indoor heat exchanger extends in the peripheral direction of the indoor fan and is arranged opposite to the air outlet, and the indoor heat exchanger is arranged around the indoor fan; the side wall face, facing the air outlet, of the indoor heat exchanger forms a heat exchange face, and an air guide mounting plate is arranged on the heat exchange face, extends in the width direction of the indoor heat exchanger and is parallel to the central axis of the indoor fan. And at least the part, connected to the heat exchange surface, of the air guide mounting plate is perpendicular to the heat exchange surface. According to the indoor unit and the embedded air conditioner provided by the invention, the aerodynamic performance between the fan blade air outlet and the indoor heat exchanger can be effectively improved, the generation of vortexes is reduced, and the generation of fin noise at the indoor heat exchanger is reduced.

The application belongs to the technical field of combustion engines, and provides a large-size side exhaust pipe of a turboshaft engine, which comprises: a pipe body having an inlet end and an outlet end; an outlet reinforcing structure arranged at the outlet end region of the pipe body; a support structure arranged inside the pipe body; an anti-abrasion connecting structure arranged at the inlet end of the pipe body; and an internal flow passage of the pipe body is configured to guide the gas input from the inlet end to be discharged laterally at the outlet end, the internal flow passage of the pipe body has a preset expansion cone angle θ2, the flow passage center line of the pipe body is a three-dimensional space curve constructed based on a non-uniform rational B-spline curve, and the ratio of the outer diameter size of the inlet end to the center transverse distance between the inlet end and the outlet end satisfies a preset condition. The core aerodynamic problem of "complex internal flow field organization of a large-size side exhaust pipe, non-uniform outlet flow field and small effective aerodynamic area" in the prior art is solved, and the limit performance of the exhaust pipe is excavated without affecting the performance of the engine.

The present invention relates to the technical field of muffler sheets, and in particular to a muffler sheet. The muffler sheet comprises: a muffler sheet shell, at least part of which is composed of a perforated plate; and a sound absorbing material, which is uniformly filled inside the muffler sheet shell; the muffler sheet shell is sequentially constructed into a leading edge plate, a middle panel and a tapered panel along the airflow direction S, wherein the middle panel and the tapered panel are respectively composed of two perforated plates with different perforation rates. The muffler sheet provided by the present invention can muffle different spectral parts of the noise source by using different perforation rates in the middle panel part and the tapered panel part, thereby achieving the best overall sound reduction under the same pressure loss conditions.

The invention relates to the technical field of design of centripetal turbines of micro gas turbines, in particular to a design method for a volute and a nozzle ring of a centripetal turbine of a micro gas turbine. One-dimensional design of a volute and a nozzle ring is carried out by adopting a near-zero vortex design method, after a three-dimensional model is established, three-dimensional flow analysis and structure optimization are carried out, and the blade profile design of the nozzle ring adopts an integer operation mode in the design of an axial flow plane cascade gas turbine under the framework of the near-zero vortex design. The required annular blade grid is obtained through shape-preserving transformation, the blade profile can achieve a better pneumatic effect, and the energy conversion rate is increased; ribs are additionally arranged at an outlet in the volute design, and the problem that static strength of the volute is insufficient possibly is solved. Due to the design of the nozzle ring and the volute, the overall design requirement of the centripetal turbine of the micro gas turbine is met, the aerodynamic performance of the turbine is further improved, and the flowing loss of airflow is reduced.

The invention relates to a hybrid module (1) for transmitting drive energy from a first drive device and a second drive device (2) to a transmission input shaft (3), wherein a separating clutch (4) is present, which is designed to separate and establish a torque flow or a force flow between at least one drive device (2) and the transmission input shaft (3), wherein a torsional vibration damper (5) is connected to the torque flow or the force flow, wherein a hydraulic fluid line (6) is contained in the transmission input shaft (3), which is designed so that both the separating clutch (4) and the torsional vibration damper (5) can be supplied with hydraulic fluid. The invention also relates to a drive train of a motor vehicle having such a hybrid module (1).

The application relates to the technical field of kitchen appliances, and discloses a range hood. The range hood comprises a fan assembly and a pipeline assembly, the fan assembly comprises a machine box and a fan which is obliquely arranged in the machine box, an air inlet of the machine box is arranged on the machine box, the pipeline assembly is connected with the machine box, an inner cavity of the pipeline assembly is communicated with the air inlet of the machine box, and a noise reduction outward expansion structure close to a wall and a flow guide outward expansion structure away from the wall are arranged at the connection position of the pipeline assembly and the machine box. Since the fan is obliquely arranged at a certain angle, the wide flow channel side area of the fan air inlet is farther away from the air inlet of the machine box, the airflow of the fan air inlet is beneficially flowed, the noise reflected by the noise reduction outward expansion structure has a certain phase angle with the noise direction of the fan, thereby canceling part of the noise energy, the outward expansion direction of the flow guide outward expansion structure is towards the kitchen internal space, the airflow turning angle is increased, the flow loss is reduced, the tail edge separation vortex is weakened, the effective flow area is increased, and the performance of the fan can be further improved.

The invention discloses a two-stage screw air compressor with an efficient heat dissipation function. The air compressor comprises a first-stage rotor assembly, a second-stage rotor assembly, a flow guide part and an oil way module. The first-stage rotor assembly comprises a first-stage machine body, a first-stage male rotor and a first-stage female rotor; a first air inlet is formed in the top of the first-stage machine body; the first-stage male rotor and the first-stage female rotor are rotationally arranged in the first-stage machine body; the second-stage rotor assembly is arranged at the rear end of the first-stage rotor assembly and comprises a second-stage machine body, a second-stage male rotor and a second-stage female rotor; a second air inlet is formed in the rear end of the bottom of the second-stage machine body; the second-stage male rotor and the second-stage female rotor are rotationally arranged in the second-stage machine body; the flow guide piece is arranged at the bottoms of the first-stage machine body and the second-stage machine body to form a gas flow channel connected with the first gas outlet and the second gas inlet; the oil way module communicates with bearings at the two ends of the rotors and inner cavities of the flow guide parts. Through the arrangement, the air compressor is better in heat dissipation performance and higher in compression efficiency.

The invention discloses a double-cone oil cavity structure of a high-rotating-speed diaphragm compressor and a manufacturing method of the double-cone oil cavity structure. The double-cone oil cavity structure of the high-rotating-speed diaphragm compressor comprises a cylinder cover and a supporting assembly. The cylinder cover is installed on the supporting assembly, a diaphragm and an oil distribution disc are arranged between the supporting assembly and the cylinder cover, a first oil cavity is formed between the supporting assembly and the bottom of the oil distribution disc, the oil distribution disc is provided with an oil outlet channel, the bottom of the oil distribution disc is provided with a first conical protruding part, a piston hole is formed in the supporting assembly, and a piston is arranged in the piston hole. The top of the piston is in a second cone shape, and the first cone shape and the second cone shape are oppositely arranged. The top of the piston is in the second cone shape, and the first cone-shaped protruding part is arranged at the bottom of the oil distribution disc, so that when the piston moves from a lower dead center to an upper dead center, hydraulic oil can be guided to flow in the first oil cavity in the radial direction, impact of the hydraulic oil on the oil distribution disc is reduced, and the flowing loss of the hydraulic oil is reduced; therefore, the cavitation phenomenon is prevented.

The invention discloses a pump-pool-free low-temperature liquid hydrogen centrifugal pump, and relates to the technical field of liquid hydrogen pumps, the pump-pool-free low-temperature liquid hydrogen centrifugal pump comprises a pump shell, the pump shell internally comprises a working cavity and a motor cavity, a pump body is arranged in the working cavity, a driving motor is arranged in the motor cavity, and the pump shell is provided with a suction inlet and a liquid outlet; a plurality of flow guide fixing frames are arranged between the inner side wall of the motor cavity and a stator of the driving motor, and flow passing channels connecting the working cavity and the liquid outlet are formed among the flow guide fixing frames, the pump shell and the motor stator. And the overflowing flow channel helps liquid pressurized by the working cavity to directly lubricate and cool the driving motor and the bearing, and the liquid is smoothly discharged from the liquid outlet. A pump pool structure and a motor cavity wall face through hole of a traditional low-temperature liquid hydrogen immersed centrifugal pump are omitted, the structure of the liquid hydrogen pumping device is simplified, the weight is reduced, and space is saved; and the liquid hydrogen fully cools and lubricates the motor and the bearing, and takes away heat and hydrogen through the liquid outlet in time, so that the running stability of the pump is improved.

The utility model discloses a kind of muffler and compressor, it is related to compressor technical field, wherein, compressor includes bearing, bearing is equipped with air inlet hole, muffler includes shell and partition piece;Shell is sleeved in bearing;Partition piece is located in shell, for the inner chamber of shell is separated into first sound attenuation chamber, second sound attenuation chamber and third sound attenuation chamber, first sound attenuation chamber is communicated with air inlet hole, second sound attenuation chamber is communicated with first sound attenuation chamber and third sound attenuation chamber respectively, second sound attenuation chamber and third sound attenuation chamber are located in the side of first sound attenuation chamber away from bearing, second sound attenuation chamber is located in the periphery of third sound attenuation chamber, shell is equipped with the air outlet hole communicated with third sound attenuation chamber;The technical scheme provided by the utility model can solve the problem that traditional double-layer muffler is difficult to meet the requirement of high sound attenuation volume, cannot effectively reduce compressor frequency band noise.

The utility model provides a kind of flow guide structure and extractor hood, it is related to the technical field of kitchen appliance, flow guide structure includes: flow guide piece and drive mechanism, flow guide piece includes multiple outer side walls connected in order in circumferential direction head and tail, and the circumferential length of each outer side wall is adjustable;Drive mechanism is connected with flow guide piece, for driving each outer side wall of flow guide piece is reduced or enlarged at equal ratio.

The application relates to the technical field of kitchen appliances, and discloses a range hood. The range hood comprises a fan assembly and a pipeline assembly, the fan assembly comprises a machine box and a fan arranged in the machine box, an air inlet of the machine box is arranged on the machine box, the pipeline assembly is connected with the machine box, an inner cavity of the pipeline assembly is communicated with the air inlet of the machine box, a flow guide outer expansion structure is arranged at the connecting position of the pipeline assembly and the machine box, the area of the flow guide outer expansion structure is adjustable, and the angle of the flow guide outer expansion structure relative to a horizontal plane is adjustable. The range hood provided by the application has the advantages that the airflow turning angle is large, the flow loss is reduced, the tail edge separation vortex is weakened, the effective flow area is increased, the performance of the fan can be further improved, the flow guide outer expansion structure can be adjusted according to different airflow flow states, the flow guide outer expansion structure is matched with the performance of the fan, the performance of the fan is maximally exerted, and the adaptability to the flow working condition is further improved.

The present application relates to a kind of vane and impeller with the vane, vane includes vane body, the front end of the vane body is vane leading edge, rear end is vane trailing edge;The thickness of the vane body is gradually increased thick gradually decreasing from vane leading edge to vane trailing edge, and form a smooth vane body;The maximum camber position of the cross section of the vane body is located at 25%-75% of vane chord length.The vane of the present application can effectively save material and reduce noise by changing the maximum camber position of vane cross section and using front bending and rear sweep form.

The present invention discloses a pneumatic electronic parking brake module for a commercial vehicle, and relates to the technical field of commercial vehicle braking. The pneumatic electronic parking brake module for a commercial vehicle comprises a controller 50, a housing 56, a relay valve 4, a two-position two-way solenoid valve 1, a two-position two-way air control valve 2, a two-position three-way solenoid valve 3, a first drive solenoid coil 90, and a second drive solenoid coil 91. The overall design is integrated, and compared with a traditional parking brake system, the connection between pneumatic pipelines and electrical circuits is reduced, and the module has the advantages of high integration, small installation space, and high reliability. At the same time, the integrated installation is also convenient for subsequent maintenance, which can reduce maintenance costs.

The application relates to the technical field of aero-engines, and provides a main combustion stage mixing pipe of a center staged combustion chamber, the center staged combustion chamber and an aero-engine. The main combustion stage mixing pipe of the center staged combustion chamber comprises a mixing pipe body, the first end of the mixing pipe body is a closed end, a through hole is arranged in the center of the closed end and is used for injecting fuel, and the second end of the mixing pipe body is an open end; the mixing pipe body is provided with multi-stage rotational flow hole structures, each stage of the rotational flow hole structures is communicated with the inside of the mixing pipe body, air enters the mixing pipe body through the rotational flow hole structures and is mixed with fuel to spiral flow, so that the air and the fuel are uniformly mixed. Compared with the rotational flow mixing by using blades, the rotational flow hole structures shorten the axial length of the mixing pipe body, so that the structure of the combustion chamber is more compact, the flow loss is reduced, stable combustion is realized, and the combustion demand of a new generation of aero-engines is met.

The invention discloses a high-efficiency multistage pump, which comprises a segmented pump casing (1), a centrifugal impeller (2), a partition (3), a positive guide vane (4), and a reverse guide vane (5), wherein the segmented pump casing has a radial section (11); the centrifugal impeller comprises a front disc (21), a rear disc (22), a blade (23), and an inlet ring (24), wherein the blade has a blade leading edge (26), and the reverse guide vane has a reverse guide vane trailing edge (51); the pump is characterized in that a sealing groove (52) is provided on the reverse guide vane, the upstream end of the inlet ring is embedded in the sealing groove, the left side surface of the radial section (11) is used as a reference surface, the upstream end surface of the inlet ring is located on the left side of the reference surface, and the reverse guide vane trailing edge is substantially located on the right side of the reference surface. The invention can effectively improve the sealing effect between the reverse guide vane and the next-stage impeller, reduce the backflow and turbulence at the impeller inlet, and reduce the flow loss at the next-stage impeller inlet, thereby improving the hydraulic performance and efficiency of the multistage pump.

The present application relates to the technical field of a warmer, in particular to a warmer. The warmer comprises: a fan assembly, a volute outlet adapted to air outlet is arranged on the fan assembly; an air outlet unit, an annular air outlet is arranged on the air outlet unit; a flow guide outer wall adapted to communicate the volute outlet and the annular air outlet; and a flow guide inner wall, the flow guide outer wall and the flow guide inner wall are arranged at intervals, a flow guide cavity is formed between the flow guide outer wall and the flow guide inner wall, and the flow guide cavity is adapted to guide the airflow to be uniformly discharged from the volute outlet to the annular air outlet. The warmer provided by the present application forms a funnel type air guide structure by arranging the flow guide outer wall and the flow guide inner wall, so that the airflow from the fan assembly is more smoothly introduced into the air outlet unit; by arranging the flow guide grid, the airflow is more uniformly flowed to the annular air outlet direction, so that 360° full range super wide angle air supply is realized, the purpose of uniform heating is achieved, and the comfort of bathing is improved.

The utility model discloses an underground water injection turbine generator which comprises a generator body, a guide wheel, a turbine structure and a vortex hoop. The turbine structure comprises a bearing, a turbine disc and a plurality of turbine blades; the bearing is rotationally connected with a spindle of the generator body; the turbine disc is rotationally connected with a main shaft of the generator body through a bearing, the turbine blades are fixedly arranged on the outer wall of the turbine disc, and the sides, away from the turbine disc, of the turbine blades are fixedly connected with the inner wall of the vortex hoop. The guide wheel is fixedly connected with a main shaft of the generator body and located on the side, back to the generator body, of the turbine structure. The vortex hoop is fixedly arranged on the side, away from the turbine disc, of the turbine blade, so that when the underground water injection turbine generator works, the centrifugal force of the turbine blade completely acts on the vortex hoop, the turbine blade only needs to bear pressure stress instead of traditional tensile stress, the centrifugal load borne by the turbine blade is reduced, and the service life of a turbine is prolonged.

The invention discloses an airplane ozone converter which comprises a shell, a flow deflector, a catalyst, a catalyst carrier assembly, a wrapping material and a grounding ring, the shell is of a structure with an expanded inlet and a contracted outlet, and flow deflectors distributed in the circumferential direction are arranged on the inner wall of the expanded section of the inlet; the catalyst carrier assembly is of a porous structure and is fixed in the middle in the shell, and a catalyst is attached to the inner surface of the porous structure of the catalyst carrier assembly so as to carry out catalytic chemical reaction on ozone passing through airflow; the outer circumference of the catalyst carrier component is coated with the coating material; and a grounding ring is arranged on the shell. According to the invention, the aerodynamic resistance can be reduced while the ozone catalytic efficiency is improved.

The present invention discloses a streamline tunnel type rotating fluid machinery flow channel design and forming method and includes the following steps: S1: obtain the relevant constraint parameters obtained by one-dimensional design; S2: obtain the center line expansion projection curve and construct it as a cubic Hermite curve; S3: after obtaining the center line expansion projection curve, restore the expansion plane to a cylinder, and obtain the equation of the cylindrical projection curve; S4: if the meridian form is known, it is easy to obtain the equation of the torus where the center line is located; S5: combine the above-mentioned cylindrical projection curve and the torus equation to obtain the equation of the actual flow channel center line; S6: according to the flow characteristics and speed conditions of the rotating machinery, the flow channel inlet and outlet areas are obtained, thereby forming a complete flow channel. The present invention can be easily expanded to the streamline design of more fluid machinery through the combined equation method, and is suitable for media such as gas, liquid, solid powder and multiphase mixed fluid, forming a design system from streamline to flow channel, low dimension to high dimension, and can make a more reasonable prediction of mechanical performance.

The invention provides a mixing device and a mixing method.The mixing device comprises a premixing module and a mixing module, the premixing module is used for premixing hydrogen and natural gas to obtain hydrogen and natural gas premixed gas; and the mixing module is used for mixing the hydrogen and natural gas premixed gas to obtain a hydrogen and natural gas uniform mixed gas. According to the technical scheme, good pre-mixing can be conducted in the hydrogen injection stage in a stepped pre-mixing mode, hydrogen is injected in the full-cross-section range, and good pre-mixing of hydrogen and natural gas is achieved in the pre-mixing stage; by adopting the perforated baffle plate assembly, the jet flow is increased while the fluid generates such motions as rotation, segmentation, turning and convergence, and the jet flow and the turning direction are coupled, so that the fluid is more uniformly mixed. Compared with the prior art, the mixing effect of natural gas and hydrogen can be effectively improved, and meanwhile flow loss is reduced.

The utility model discloses an efficient current collector which belongs to the technical field of air conditioners and comprises an inlet end, a pressure stabilizing end and an outlet end, the inlet end comprises a first straight section, a contraction section and a second straight section, the cross section of the first straight section is square, the cross section of the second straight section is round, the second straight section is connected with the pressure stabilizing end, and the contraction section is connected with the pressure stabilizing end. The cross section of the pressure stabilizing end is circular, and the cross section of the outlet end is circular. The inlet end is in a rounded rectangle shape and is effectively connected with the heat exchanger, flowing of airflow is improved, the efficiency of the converter is improved, and meanwhile noise is reduced.

The invention relates to the technical field of aero-engine turbine blades or heavy-duty gas turbine blades, in particular to a novel flap type turbine blade structure and a variable cycle engine, and the novel flap type turbine blade structure comprises a connecting assembly, a cover plate, a flap blade, an end wall and a front edge fixed blade. The flap blade penetrates through the end wall and moves in the end wall, the front edge fixed blade is seamlessly connected with the end wall, and the combined action of a cover plate and a sealing ring above the flap blade is matched, so that the blade top parts and the blade bottom parts of the front edge fixed blade and the flap blade are gapless, and the blade gap leakage vortex is effectively avoided; and through the sealing effect of the sealing ring and tightly-sealed cold air, high-temperature gas leakage at the seam of the end wall is effectively prevented. The variable-cycle turbine blade solves the problems that an existing variable-cycle turbine blade is large in total pressure loss and low in safety and stability due to backflow of high-temperature fuel gas caused by a blade top gap and a blade bottom gap, the oil consumption rate of an aero-engine is reduced, and economic benefits are improved.