46results about How to "Enhanced convective heat transfer intensity" patented technology

The invention discloses a turbine blade trailing edge turbulence half-slit cooling structure with an array of pin ribs. The array of pin ribs is applied to the half-slit wall surface, and the flow turbulence structure is passed without increasing the outflow of the gas film. Improve the convective heat transfer coefficient and heat transfer area of ​​the air film, and enhance the convective heat transfer intensity of the half-slit air film cooling, thereby improving the comprehensive cooling effect of the trailing edge of the blade. Turbine blade trailing edge turbulent half-split cooling structure with continuous array of needle ribs cuts off part of the wall on the pressure surface of the blade trailing edge, retains the wall on the suction side of the blade trailing edge and separates the partition ribs to form multiple half-splits Slit structure, the cooling air flow is ejected from the cold flow outlet and covers the split wall of the trailing edge to form a cooling air film. The structure is simple; the maximum temperature and average temperature of the suction surface can be effectively reduced, and high-temperature ablation of the suction surface of the turbine blade can be avoided. The straight rib structure is arranged on the half-slit wall surface, which has good heat transfer characteristics and good processing feasibility.

The invention discloses a turbine blade trailing edge turbulence semi-slit cooling structure with continuous straight ribs. The straight rib structure is applied to the wall surface of the trailing edge half-slit. The flow structure improves the convective heat transfer coefficient and heat transfer area of ​​the air film, and enhances the convective heat transfer intensity of the half-slit air film cooling, thereby improving the comprehensive cooling effect of the trailing edge of the blade. The turbulent half-split cooling structure is to cut off part of the wall surface on the pressure surface of the blade trailing edge, and retain the wall surface on the side of the suction side of the blade trailing edge and the spaced partition ribs to form a plurality of half-slit structures. The design is reasonable and the structure is simple; its characteristics are The cooling air flow is ejected from the cold flow outlet and covers the half-slit wall surface to form a cooling air film, which can effectively reduce the maximum and average temperature of the suction surface and avoid high-temperature ablation of the suction surface of the turbine blade. A simple straight rib structure is arranged on the half-slit wall surface, which has good heat transfer characteristics and good processability.

The invention relates to a micro combustor with a built-in cross partition plate and belongs to the field of energy combustion and utilization. The combustor comprises a combustor outer wall, the cross heat-conduction partition plate, a gas inlet and a gas outlet. The combustor outer wall comprises an upper wall, a lower wall, a left wall and a right wall. According to the combustor, by the adoption of the mode that the cross heat-conduction partition plate is arranged, turbulence of incoming flow gas is enhanced, and detention time is prolonged to a certain degree. Meanwhile, due to the fact that a channel becomes narrow in the partition plate area, the convective heat exchange strength of the inner wall surface and the mixed gas is improved, and rapid transfer of heat is achieved. The high-temperature gas flow is divided into four streams along the cross partition plate, so that temperature distribution of the wall surface is more uniform. Due to the design mode of the built-in cross heat-conduction partition plate, the micro-scale combustion process in the channel is more sufficient and stable, the radiation temperature of the wall surface can be increased, temperature distribution of the wall surface is more uniform, and thus a positive effect is achieved on improvement to the output performance of a miniature thermo photovoltaic system.

The invention relates to an intake silencer for an acoustic enclosure of a compressor unit. The intake silencer is mainly composed of an intake silencer box body, a plurality of broken line type intake silencing channels and a right-angle triangular prism sound absorption structures, wherein the intake silencer box body is of a quadrangular prism structure with trapezoidal side plates, and the broken line type intake silencing channels formed by arranging the right-angle triangular prism sound absorption structures side by side in a broken line form are arranged in the intake silencer box body; and each right-angle triangular prism sound absorption structure is composed of a right-angle triangular prism sound absorption structure inclined face, a right-angle triangular prism sound absorption structure long right-angle face, a right-angle triangular prism sound absorption structure short right-angle face and an unequal-thickness cavity structure. The intake silencer has the advantages of being simple in structure, accelerating the intake speed, increasing the effective ventilation quantity, effectively controlling the noise transmission path, remarkably improving the noise reduction effect and the like.

The invention relates to the technical field of air conditioners, and discloses an electric appliance box heat dissipation device. The device comprises an electric appliance box, a fan, a compressor,a liquid storage tank, a liquid storage tank pipe sleeve and a heat pipe bundle, and is characterized in that the compressor is connected with the liquid storage tank; the liquid storage tank pipe sleeve is disposed outside the liquid storage tank in a sleeved manner; one end of the heat pipe bundle is wrapped in the liquid storage tank pipe sleeve, and the electric appliance box, the fan and theheat pipe bundle are arranged at intervals. Due to the fact that the electric appliance box and the heat pipe bundle are arranged at intervals, the condensate water cannot be generated in the electricappliance box any more and is generated on the surface of the heat pipe bundle, thereby guaranteeing that the electric appliance box cannot be short-circuited, and safe and stable operation can be achieved.

The invention discloses a volumetric solar cavity heat absorber with a rotary heat absorbing body. The volumetric solar cavity heat absorber is composed of an outer barrel, the heat absorbing body, a glass cover plate, a motor, a controller, a temperature sensor and the like, wherein the heat absorbing body is composed of a heat absorbing main body in a concave cavity shape, a plurality of outer fins arranged on the outer side surface and the outer bottom surface of the heat absorbing main body, a plurality of inner fins arranged on the inner side surface of the heat absorbing main body and a transmission shaft arranged at the bottom of the heat absorbing main body; the inner surface of a concave cavity of the heat absorbing main body absorbs sunlight; a plurality of through holes are formed in the side wall and the bottom of the heat absorbing main body and the outer fins; and the transmission shaft is matched with a stepped hole in the bottom of the outer barrel through the shaft surface of the transmission shaft and an installed bearing, and the tail end of the transmission shaft is fixedly connected with an output shaft of the motor through a connecting sleeve. The motor is controlled to drive the heat absorbing body to rotate, so that the convective heat exchange intensity of the heat absorbing body and a heat transfer working medium is improved, the working temperature distribution of the heat absorbing body and the distribution uniformity of absorbed solar energy are improved, and safe, reliable and efficient operation of the solar heat absorber achieved.

The invention provides a turbulent flow threaded hole cooling structure for a trailing edge of a turbine blade, which is arranged in the trailing edge area of the turbine blade, and is formed by cutting off part of the wall surface of a pressure surface of the trailing edge of the turbine blade, only reserving the wall surface on one side of a suction surface and arranging a plurality of separation ribs. Cylindrical cooling holes which penetrate through the separation ribs along the flow direction of cooling air flow are formed in the separation ribs; the center line of the cylindrical cooling hole is parallel to the center line of a trailing edge cold air inlet cavity; and turbulent flow threads are arranged in the cylindrical cooling holes. Cooling airflow in the threaded holes can generate a remarkable cooling effect on the inner and outer surfaces of the separation ribs, the heat exchange area is increased through the turbulent flow threaded structures in the holes, and the convective heat exchange strength of the inner surfaces of the separation ribs is enhanced; meanwhile, the internal heat exchange of the wall surface of the suction surface can be enhanced, the blank of the split seam separation rib cooling design is filled up, and the comprehensive cooling effect of the trailing edge is improved.

The invention discloses a straight ribbed pipe fin inserting trough-type condensation vacuum solar heat collector which comprises a vacuum heat collector body and a trough-type condenser; the vacuum heat collector body is arranged in a condensation position of the trough-type condenser, and comprises a direct connection type glass vacuum casing pipe; a vacuum layer is formed between an outer glass pipe and an inner glass pipe; a straight ribbed pipe is arranged in the inner glass pipe in a penetrating manner, and is fixed through springs; two arc-shaped heat insulating plates are arranged in the vacuum layer; and two fins are arranged on the outer side of the straight ribbed pipe. The straight ribbed pipe fin inserting trough-type condensation vacuum solar heat collector has the advantages that the condensation heat collection efficiency is high, the heat flux density received by a heat collection pipe is uniform, the external radiation heat loss of the inner glass pipe is little, the heat collection pipe is not prone to scaling, and the service life is long.

The invention provides a combustion waste heat utilization heat exchange device. The combustion waste heat utilization heat exchange device comprises a heat exchange core arranged in a waste gas flue. The heat exchange core comprises circular pipes and flat pipes. The flowing direction of liquid in the circular pipes and the flat pipes is perpendicular to the flowing direction of waste gas. The circular pipes and the flat pipes are sequentially distributed in the waste gas flowing direction. The heat exchange core of the heat exchange device is of a circular pipe and flat pipe combined heat exchange structure. A thin-wall circular-pipe-shaped heat exchange structure is adopted at the front end of the heat exchange core, and a multi-row thin-wall flat pipe type heat exchange structure is adopted at the rear end of the heat exchange core. Different heat exchange structures are adopted at different positions according to different heat absorbing amounts, the phenomenon of film boiling on the water side is effectively reduced, the heat load of the heat exchange core is reduced, and the heat exchange efficiency is improved.

The invention provides a heat exchange device capable of realizing combustion waste heat utilization. The heat exchange device comprises a heat exchange core and a casing; the heat exchange core is arranged in the casing; an upper header and a lower header are formed by the space between the heat exchange core and the casing; the casing comprises an upper casing and a lower casing; the upper casing comprises an upper casing front frame type baffle and an upper casing back frame type baffle which adopt identical structures; semi-circular holes penetrating through baffles are formed in middle areas of the upper parts of upper baffles; the upper baffle of the front frame type baffle is transversely placed at the front end of the heat exchange body upper casing and the front end of the heat exchange core and is fixed on the inner side of the heat exchange body upper casing; and side baffles of the front frame type baffle are located at the back part of the upper baffle of the front frame type baffle as well as the left side and the right side of the heat exchange core. With the heat exchange device, the baffles and flow guide plates are arranged on the heat exchange body upper casing and the heat exchange body lower casing, so that the thermal load of the heat exchange core is reduced while the heat exchange temperature difference is increased.

The high-speed low-nitrogen combustor comprises a lower straight barrel, a center gun is arranged in the lower straight barrel, a center fuel gun and an ignition gun are arranged in the center gun, the front end of the center fuel gun and the front end of the ignition gun are both arranged on a flame stabilizing device, and the flame stabilizing device is arranged at an opening in the front end of the center gun. A first air inlet is formed in the side face of the center gun, a second air inlet is formed in the side face of the lower straight barrel, a plurality of first fuel guns are arranged in the lower straight barrel and evenly and annularly distributed on the periphery of the center gun, and ports of the lower straight barrel, the center gun, the center fuel gun and the first fuel guns are located on the same side. According to the scheme, the nitrogen reduction strategy of staged combustion is adopted, combusted mixed gas is divided into three stages to be combusted in the axial direction, flames diverging from the center to the outer layer are formed, and therefore the combustor has the effects of reducing the oxidation burning loss rate, reducing generation of thermal nitrogen oxide and improving the steel billet yield.

The invention provides a turbine guide vane structure with a rib upper through seam on a trailing edge. The through seam is formed in a separation rib; after cooling airflow passes through an outflow seam, part of cooling air can cool the interiors of the separation rib through the through seam in the separation rib, so that under the condition that the cold air flow is not increased, the convection heat exchange intensity of the inner wall surface and the side wall surface of the separation rib is enhanced, and the comprehensive cooling effect of the trailing edge is improved; preferably, the through seam is an inclined seam, when cooling airflow passes through the separation rib, the strength of cold air vortexes generated under the influence of the separation rib can be weakened, so that the interaction between lip plate falling vortexes and the cold air vortexes can be weakened, and the air film cooling efficiency of the surface of the separation rib is improved. The structure is reasonable in design and simple in structure, and the inclined seam is formed in the side wall surface of the separation rib, so that the heat exchanger has good heat transfer and cooling characteristics, has good machining integrity and is more practicable.