43results about How to "Little impact on the flow field" patented technology

The invention relates to a plasma-based aircraft aerodynamic characteristic analysis method. According to the method, the lift coefficient is improved and the drag coefficient is reduced based on the dielectric barrier discharge (DBD) plasma control technology. The lift-drag ratio of an aircraft is improved and the aerodynamic characteristic performance of the aircraft is improved. Furthermore, in the dielectric barrier discharge (DBD) plasma condition, the aerodynamic characteristics of the surface of the aircraft can be analyzed and obtained.

The invention discloses a device and a method realizing synergic effects of waste heat utilization, desulfurization wastewater zero-emission and smoke plume removal, the device comprises a boiler, anair preheater, a dust remover, a desulfurization tower and a chimney which are sequentially connected through a pipeline, a wastewater sedimentation tank, a wastewater concentration tower and a wastewater flashing tower simultaneously are connected to corresponding equipment in the device, a high-temperature gas required in the working process of the wastewater flashing tower and the wastewater concentration tower is taken from high-temperature flue gas during the operation of the device; and generated gases are sent into the dust remover for dust removal circulation. An acoustic wave agglomeration device and a demister are disposed in a connecting pipe between the desulfurization tower and the chimney. The method comprises the steps of concentrating and flashing the high temperature fluegas in the process of operation of the desulfurization wastewater utilization device, and finally feeding the concentrated and flashed gas to the device for circulation, thereby achieving zero emission, discharged smoke plume can be reduced by use of synergic effects of the reduced flue gas temperature, the acoustic wave agglomeration device and the demister, and the goal of energy saving and environmental protection, wastewater zero-emission and exhaust emission reduction can be comprehensively realized.

The invention is suitable for the field of airfoil wind tunnel test equipment, and particularly relates to an airfoil type wind tunnel test bench, which comprises an experiment flat plate, a six-component measuring balance an upper anti-interference airfoil profile and a lower anti-interference airfoil profile; a rotation adjusting flat plate is rotatably arranged on the experiment flat plate, and accurate angle adjustment is completed by using a dial arranged on the rotation adjusting flat plate, so that the airfoil wind tunnel test bench is used for wind tunnel tests under different attack angles; the six-component measuring balance is used for measuring force through a plurality of force measuring rods arranged between the experiment flat plate and the six-component measuring balance, the force measuring rods are used for transmitting the force borne by the measured empennage in the wind tunnel test to the six-component measuring balance, and the force is measured through the six-component measuring balance; and the upper anti-interference airfoil profile and the lower anti-interference airfoil profile are respectively arranged at two sides of the tested airfoil profile and are used for preventing an induced vortex from being formed on the upper and lower end surfaces of the airfoil profile due to the flow velocity and pressure difference on two sides of the airfoil profile to influence a two-dimensional airfoil profile test result; and the upper anti-interference airfoil profile is fixed through a fixing device located on the side face in the incoming flow direction and used for reducing the influence of the fixing device on the flow field of the test section.

The invention belongs to the fields of green marine technology and ocean renewable energy comprehensive utilization and relates to a wave power generation device for a triple-hulled vessel. The wave power generation device comprises a swing plate, a swing shaft, a return torsional spring, a gear transmission device, a ratchet wheel mechanism and an electromagnetic power generator, wherein the swing plate is divided into two parts, i.e., a long and narrow connection section, and a wave-facing area occupying most of area, the connection section is in key joint with the swing shaft, and the return torsional spring is arranged on the swing shaft; and a gear transmission mechanism comprises a bevel gear mechanism and a three-stage acceleration gear mechanism, the tail end of the swing shaft is connected with the bevel gear mechanism, the rotating direction of the swing shaft is changed by the bevel gear mechanism, and then the slow rotating speed of the swing shaft is increased to the rotating speed needed by the electromagnetic power generator via the three-stage acceleration gear mechanism, and the ratchet wheel mechanism is arranged at the output shaft of the three-stage acceleration gear mechanism. The invention also provides an arrangement mode of the device aforementioned. The wave power generation device and the arrangement mode of the device disclosed by the invention are suitable for the triple-hulled vessel, and capable of utilizing seawave energy to the greatest extent.

The invention discloses a micro-probe ultrasonic wave doppler current meter, composed of a measuring bar and a control terminal. The measuring bar is in signal connection with the control terminal in a wired or wireless mode, and comprises a pipe body, a Y-shaped rack, two micro-probe supports, a pair of ultrasonic sensors, a temperature sensor and a related circuit board, wherein the Y-shaped rack is composed of a rod part and two furcated parts; two micro-probes are fixed to the lower ends of the two furcated parts of the Y-shaped rack respectively and are perpendicular to the furcated parts; the two ultrasonic sensors are installed at the front ends of the two micro-probe supports respectively; the temperature sensor is set at the rear end of one of the micro-probe supports; the pipe body is fixed to the upper end of the Y-shaped rack, and is internally provided with the related circuit board. The measuring bar is provided with the two micro probes, allowing the micro-probe ultrasonic wave doppler current meter to posses the advantages of an ultrasonic wave doppler current mete, and the characteristic of a miniature probe; a probe sensor is tiny; the micro-probe ultrasonic wave doppler current meter can measure the current velocity of a shallow water area, and solve the problem of current measurement in a shallow water area.

The invention discloses a distortion generator for testing transient total pressure distortion of an axial flow compressor. The distortion generator comprises a slotting power brake, a plurality of sliding rail blocks, two slotting sliding sheets, a plurality of L-shaped feet and a distortion plate, wherein the slotting power-brake comprises an arc square slot hole, a plurality of threaded blind holes and pin positioning holes; the sliding rail blocks are discretely fixed on the partial threaded blind holes at the two sides of an arc-shaped square slot; one sides of the two slotting sliding sheets are provided with arc square slot opening, the two arc square slot openings are partially or fully overlapped on the arc square slot holes, and two slotting sliding sheets are fitted on the surface of the slotting power-gate and move along a track space formed by the sliding rail blocks; each L-shaped foot is spaced from each other and connected with the threaded blind holes; and the distortion plate is erected on a square slot formed by the arc square slot holes and the arc square slot openings, and the distortion plate is balanced and fixed by the L-shaped feet. The distortion generatorprovided by the invention can instantaneously generate transient distortions with different distortion strengths according to the operating conditions of the compressor, so that the experimental datahas more reference significance.

The invention discloses a coal-fired coupling garbage incineration system which comprises a garbage hopper, a feeder, a crusher, a fluidized bed garbage incinerator, a coal hopper, a coal feeder, a coal mill, a pulverized coal furnace, a flue gas ejector, an air preheater and an air feeder. Garbage is combusted in the fluidized bed garbage incinerator after being treated by the crusher, so that the stability and high efficiency of garbage combustion are ensured; coal is combusted in the pulverized coal furnace after being crushed by the coal mill, and high-temperature flue gas generated by pulverized coal combustion is extracted by the flue gas ejector to the fluidized bed garbage incinerator, so that the combustion temperature in the fluidized bed garbage incinerator is increased; and circulating flue gas exhausted by the fluidized bed garbage incinerator is fed into the pulverized coal furnace, and influences on the pulverized coal furnace is small. The system realizes coupling of the fluidized bed incinerator and the pulverized coal furnace, can improve the stability and efficiency of garbage combustion, makes full use of existing coal-fired power generation equipment, reduces the coal consumption of stored coal and electricity and reduces the investment cost for a newly built garbage incineration power plant.

The invention belongs to the technical field, and discloses a quick-response thermocouple probe. The quick-response thermocouple probe is formed by thermocouple wire poles, a probe pole, a corundum pipe, a thermocouple measuring contact and thermocouple wires, wherein the thermocouple wire poles support the thermocouple wires; the thermocouple wires are straightened through the thermocouple wire poles, and are horizontal-line shaped; the thermocouple measuring contact is located at the middle part; and facing toward the air-flow direction, the exposed thermocouple wires and the thermocouple wire poles are in II-shaped, and the shape can guarantee that the thermocouple fully contacts the flow field and is convenient for exchanging the thermocouple wires. The quick-response thermocouple probe is generally suitable for K-type, T-type and J-type of thermocouples. Compared with a traditional thermocouple probe, the thermocouple probe can select a thermocouple with very small thermal inertia; the thermocouple wires can be fixed in the flow field to be detected through the thermocouple wire poles; the thermocouple probe can measure the high frequency pulsation air-flow temperature; and the thermocouple wires can maintain intensity and rigidity under the high speed air-flow impact, and are not easy to be bent and deformed.

The invention discloses a hot air heat utilization system for an indirect cooling tower. The hot air heat utilization system comprises the indirect cooling tower and an air inlet header; a plurality of air outlets are symmetrically formed in the part above a heat exchange area of the indirect cooling tower, and an annular air extracting box is arranged outside the air outlets and is connected to the outer side of the indirect cooling tower in a sealed mode; an outlet of the annular air extracting box is connected to the air inlet header, and hot air of the indirect cooling tower is conveyed into an air heater by a fan for being heated again after flowing through the air inlet header. According to the hot air heat utilization system, during the low-temperature operation period of a unit, the hot air of the indirect cooling tower is utilized as the air source entering the air heater, and therefore the steam extraction amount of the air heater can be lowered, the operation efficiency of a steam turbine can be improved, the exhaust gas temperature of a boiler can be increased, and blockage and corrosion of an air pre-heater can be reduced; the air extracting box is arranged in an annular mode, and therefore air inletting is stable; during the low-temperature operation period, the coal consumption of power generation can be lowered by 0.5 g/(Kw.h).

The invention belongs to the field of aero-engine tests, and relates to a tail nozzle temperature field visualization device based on binocular vision and an identification method thereof. The tail nozzle temperature field visualization device comprises a cooling probe, a top black background plate, and a processor storing temperature field measurement and tail nozzle recognition post-processing programs, wherein the cooling probe is located at the lower position of the central axis of the engine tail nozzle; a binocular camera is arranged in the cooling probe; the binocular camera has a top view angle along the axial direction of the cooling probe and a side view angle along the radial direction of the cooling probe; the top black background plate is located within the top view angle; theengine tail nozzle is positioned within the side view angle; and the binocular camera of the cooling probe sends a shot image to the processor, so that the image is processed according to a processing program stored in the binocular camera, and a temperature field of the combustion chamber is obtained.

The invention provides a convenient garbage intercepting and cleaning device for the inside of a fish way. The convenient garbage intercepting and cleaning device for the inside of the fish way comprises triangular frame nets and guide tracks which are symmetrically arranged on side walls of the fish way. The convenient garbage intercepting and cleaning device for the inside of the fish way is characterized in that each triangular frame net comprises a galvanized steel pipe frame, each galvanized steel pipe frame is a triangular prism, one surface of each triangular prism is fixed on the corresponding side wall of the fish way by an expansion sleeve, and each triangular prism is in contact with the corresponding guide track. The device is provided with the two symmetric triangular frame nets and manual lifting devices, by automatic selectivity of migration of 'upward moving fishes' and 'floating garbage', the floating garbage can be intercepted and cleared by the triangular frame netson the left side and the right side, and the upward moving fishes can move upwards selectively along a channel formed between the two triangular frame nets in a staggered manner. The convenient garbage intercepting and cleaning device for the inside of the fish way has water permeability, influences to a flow field in the fish way are small, when the garbage is intercepted and cleared, the circumstance that a gate is closed to stop water is avoided, and passing of the fishes is not affected. In addition, the device is simple to manufacture and mount, simple to operate and wide in applicability.