84results about How to "Increase the Reynolds number" patented technology

The measuring system is inserted into the course of a process line and serves for registering at least one measured variable of a medium flowing in the process line. The measuring system includes for such purpose a measuring transducer having a measuring tube serving for conveying medium being measured and a sensor arrangement, which has at least one sensor element reacting primarily to the measured variable to be registered, and which delivers by means of at least one sensor element at least one measurement signal influenced by the measured variable. Further, the measuring system includes a measuring electronics communicating with the measuring transducer and using the at least one measurement signal for producing, at least at times, at least one measured value instantaneously representing the measured variable. The measuring tube has, in the case of the measuring system of the invention, a smaller flow cross section than a supply segment of the process line connected to the inlet end of the measuring system. To this end, the measuring system further includes a flow conditioner arranged at the inlet end of the measuring tube and mediating between the measuring tube and the supply segment of the process line. The flow conditioner has a lumen tapering in the direction of the measuring tube. During operation, medium flows through the lumen of the flow conditioner. The flow conditioner includes at least one inner edge arranged upstream of its outlet end and protruding into the lumen of the flow conditioner. During operation, medium conveyed in the flow conditioner flows against the inner edge.

A device for measuring fluid flow rates over a wide range of flow rates (<1 nL/min to >10 μL/min) and at pressures at least as great as 2,000 psi. The invention is particularly adapted for use in microfluidic systems. The device operates by producing compositional variations in the fluid, or pulses, that are subsequently detected downstream from the point of creation to derive a flow rate. Each pulse, comprising a small fluid volume, whose composition is different from the mean composition of the fluid, can be created by electrochemical means, such as by electrolysis of a solvent, electrolysis of a dissolved species, or electrodialysis of a dissolved ionic species. Measurements of the conductivity of the fluid can be used to detect the arrival time of the pulses, from which the fluid flow rate can be determined. A pair of spaced apart electrodes can be used to produce the electrochemical pulse. In those instances where it is desired to measure a wide range of fluid flow rates a three electrode configuration in which the electrodes are spaced at unequal distances has been found to be desirable.

The measuring system is inserted into the course of a process line and serves for registering at least one measured variable of a medium flowing in the process line. The measuring system includes for such purpose a measuring transducer having a measuring tube serving for conveying medium being measured and a sensor arrangement, which has at least one sensor element reacting primarily to the measured variable to be registered, and which delivers by means of at least one sensor element at least one measurement signal influenced by the measured variable. Further, the measuring system includes a measuring electronics communicating with the measuring transducer and using the at least one measurement signal for producing, at least at times, at least one measured value instantaneously representing the measured variable.

The measuring tube has, in the case of the measuring system of the invention, a smaller flow cross section than a supply segment of the process line connected to the inlet end of the measuring system. The measuring system further includes a flow conditioner arranged at the inlet end of the measuring tube and mediating between the measuring tube and the supply segment of the process line. The flow conditioner has a lumen tapering in the direction of the measuring tube. During operation, medium flows through the lumen of the flow conditioner. The flow conditioner includes at least two inner edges arranged upstream of its outlet end and protruding into the lumen of the flow conditioner. During operation, medium conveyed within the flow conditioner flows against each of the inner edges. Between the first inner edge and the second inner edge, there extends, additionally, a first guide surface of the flow conditioner. Moreover, the second inner edge bounds a second guide surface of the flow conditioner extending in the direction of the outlet end of the flow conditioner and serving for guiding medium flowing in the flow conditioner.

A novel medium, method and system for proving a turbine meter for use with natural gas. The novel test medium is a gas having the following characteristics: (a) Density >2×Density of Natural Gas; (b) Dynamic Viscosity < Dynamic Viscosity of Natural Gas; and (c) Ideal gas behavior for approximately 15° C.<T<25° C. and 1 bar<P<50 bar. The method and system make use of the novel test medium. Also disclosed is a novel method and system for cooling a test medium circulating in a turbine meter prover system involving injecting liquefied test medium into said circulating test medium.

The invention relates to the technical field of unmanned aerial vehicles, and particularly discloses a propeller and an aircraft. The propeller comprises a propeller hoop and at least two propeller blades connected with the propeller hoop. The wing type of the propeller blades is ARA-D, and each propeller blade is composed of a root portion, a main body portion and a blade tip portion which are sequentially connected. The length L1 of the root portion accounts for 20% to 30% of the length L of the propeller blades, and the length L of the propeller blades is the length, in the first direction from the center of the propeller hoop to the farthest end of the blade tip portions, of the propeller blades; the installing inclined angle of the root portions ranges from 10 degrees to 15 degrees, and the blade widths of the root portions are gradually increased in the first direction; the length L2 of the main body portions accounts for 60% to 70% of the length of the paddle blades, and the blade widths of the main body portions are gradually decreased in the first direction; the minimum blade width of the main body portions accounts for 55% to 65% of the maximum blade width of the main body portions; and the length L3 of the blade tip portions is equal to L-L1-L2, and the blade widths of the blade tip portions are gradually decreased in the first direction. According to the propeller, the air resistance is reduced, efficiency is improved, and therefore the flying speed and the flying distance of the aircraft are increased.

The invention relates to a backheating gas mixed circulating refrigeration, heating and temperature adjustment system which comprises a circulating fan, a gas exhaust port, a two-channel regenerator, a water-cooling heat exchanger, a liquid nitrogen flow control valve, a liquid nitrogen storage tank, a liquid nitrogen mixer, a heater, a heating stop valve, a refrigeration stop valve, a universal stop valve, a vaporizer, a heat sink, a sensor and pipelines. Gas such as nitrogen or air serves as a circulating working medium, the circulating fan circulates the gas in the pipelines, and the circulating gas cools or heats the heat sink; during high-temperature circulating, heating temperature control is performed on the gas via the heater; during low-temperature circulating, cooling temperature control is performed on the gas via liquid nitrogen; and the cooling or heating quantity of the gas flowing out of the heat sink is recovered via the two-channel regenerator. Therefore, the flow energy consumption is reduced; the circulating fan can operate at a room temperature; the operation reliability of the fan is improved; and precise temperature control can be performed on environmental simulation equipment, namely the heat sink from -173 DEG C to 200 DEG C.

The invention discloses the technical field of water treatment, and particularly relates to a spacer member in an electrodialysis device. An electrodialysis spacer comprises a board frame, a water distribution flow passage, liquid guide holes and a board-core grid, wherein half of the liquid guide holes are elliptical, and half of the liquid guide holes are semi-elliptical, connected with the water distribution flow passage and communicated with the inner cavity of the board frame; the elliptical liquid guide holes are arranged at one end of the board frame; and the board-core grid is distributed in the inner cavity of the board frame. The electrodialysis spacer has the advantages that the flow capacity can be improved and the resistance is reduced in the water flow process; and the electrodialysis spacer has the characteristics of being good in elasticity, resistant to strong acid, strong base and organic solvent, easy to seal and good in leak tightness.

The invention provides a rotary liquid membrane reactor, belonging to the technical field of an inorganic functional material and used for preparing the stratiform hydrotalcite PVC heat stabilizer. Starting from a basic technique of a coprecipitation method and based on a crystal chemical principle, the invention designs the rotary liquid membrane reactor through calculation and analysis of fluid mechanics, so that two fluids flow in a turbulence manner within a confinement space. Therefore, the supersaturation degree is uniform, the nucleation rate of a system is improved, and the crystallization generation rate is reduced; alamellar hydrotalcite PVC heat stabilizer with smaller grain size and narrower grain size distribution is obtained. The grain size of the product can be controlled within a range of 10-150 nm, and the size distribution range can be reduced to 20-50 nm.

A heater comprising a conduit made of corundum (e.g. synthetic sapphire) and having a wall forming a closed cross-section with an interior surface, and an exterior surface. At least one of the interior and exterior surfaces may have a roughened portion comprising inclusions and corresponding protrusions formed substantially continuously therethroughout. An electrically resistive coating may extend substantially continuously over, in, and around the inclusions and protrusions of at least a part of the roughened portion to form a conformal cross-section having a thickness selected to promote bending thereof to accommodate annular expansion and contraction occurring in response to a differential in the coefficients of expansion between the electrically resistive coating and the conduit.

The invention discloses a corrosion reaction tester. The corrosion reaction tester comprises an electric heating rod (1) and a tester coat (2) sleevedly arranged outside the electric heating rod; a cavity (3) having an inlet at one end and an outlet at the other end is formed between the outer wall of the electric heating rod (1) and the inner wall of the tester coat (2), and the interior of the electric heating rod (1) is insertedly provided with a temperature control thermocouple (4). The invention also provides a corrosion evaluation device comprising the corrosion reaction tester and a corrosion evaluation method implemented by utilizing the corrosion evaluation device. The corrosion evaluation device provided by the invention is a corrosion evaluation device which not only has less used oil sample, simple operation and small occupied area of the device, but also has small acid loss amount and high corrosion speed, and is rapid, convenient and accurate during a testing process; and the corrosion evaluation method implemented by utilizing the device has high precision and good parallelism.

The invention discloses a blowing flow real time measuring device and a method for a pipeline with rectangular section, and belongs to the field of process parameter detection. The real time measuring device consists of a measuring pipe section, a sensor assembly, a micro differential pressure transmitter, an I/V (Current to Voltage) converter, an A/D (Analogue to Digital) converter, a temperature transmitter, a pressure transmitter, a programmable control sampling switch and a microcomputer signal processing system. The measuring pipe section is hermetically connected with the blowing pipeline through upstream and downstream flanges. According to the invention, with the adoption of m inner cones which are completely the same in structure and size and are arranged on the cross section of the pipeline with rectangular section of the measuring pipe section, a sensor module formed by the cross section of the measuring pipe section is equally divided. A flow rate-area flow measuring scheme by a multi-point inner cone method is designed to overcome the deficiencies that the inner cone method is commonly suitable for pipelines with circular sections, and exert the advantages of the inner core method. The invention provides a solution which is high in efficiency and robustness for the blowing flow of a power generating boiler through feasible practice.

The invention provides a recovery method of N-methyl pyrrolidone. The method is characterized by comprising the following steps: heating an N-methyl pyrrolidone material liquid with the water contentof 1-50 wt.% in a circulating tank to 30-190 DEG C; introducing the heated N-methyl pyrrolidone material liquid into a pervaporation membrane assembly to make water in the material liquid be separatedfrom the material liquid side of the pervaporation membrane and enter the permeation side, wherein the pervaporation membrane assembly comprises 1-3000 organic-inorganic or inorganic-organic hybrid membrane single-pass pipes or multi-pass pipes, an absolute pressure of the permeation side is set to be 100-15000 Pa, and a membrane feeding speed of the material liquid is set to be 0.15-1.6 m/s; after the material liquid passes through the pervaporation membrane assembly, making the material liquid on the material liquid side return to the circulating tank, and making the water on the permeationside be condensed and recovered; and performing circulation for multiple times on the material liquid in the circulating tank to obtain recovered N-methyl pyrrolidone.

The invention relates to the technical field of chemical and pharmaceutical equipment, in particular to a continuous flow reactor. The continuous flow reactor comprises a shell, wherein a shell side inlet and a shell side outlet which are communicated with an inner cavity of the casing are arranged on the shell; each of the upper end and the lower end of the shell is connected with a tube plate and a communicating device, a reaction tube stack is arranged in the shell and comprises multiple reaction tubes, the upper end and the lower end of each reaction tube penetrate through and are fixedly connected on the tube plates, and all the reaction tubes are sequentially connected in series through the communicating devices. By comparison with a traditional reactor, the reaction process is greatly improved under the condition of the same volume, reactants have high reynolds numbers under the condition of a low flow speed, the turbulence effect is greatly improved, unintermittent mixing is performed during constant flowing reactions, states of reaction stages can be detected in real time, and mounting and assembly are simplified.

Thermal storage system and its charging and discharging process using a heat-transfer fluid. The system includes a phase change storage material contained in a casing that is penetrated by heat exchanger tubes (3), preferably vertical ones, connected at their lower end with at least one lower chamber (62) via lower sub-chambers (62′) which include a series of injectors (9) for enabling the heat-transfer fluid to be inserted in gas form; at the upper end, these tubes (3) connect via upper sub-chambers (61′) with at least one upper chamber (61) which in turn is connected to a boiler (1) from which downpipes (8) extend via which heat-transfer fluid in liquid form circulates, located outside of the casing, connecting the aforementioned boiler (1) to the lower chamber (62), which enables the natural circulation of the heat-transfer fluid within the system.

The invention discloses a soil leaching remediation reduction system and a construction method thereof, and belongs to the technical field of soil remediation. The soil leaching remediation reductionsystem comprises a feeding primary grading unit, a high-pressure jet separation unit, a secondary grading unit, a slurry settling concentration unit, a filter pressing unit, a sewage treatment unit, adust tail gas treatment unit and an instrument electrical control unit which are connected in sequence. According to the system, the grading quantity and the equipment quantity are greatly reduced, and for soil treatment of small-sized polluted sites, the whole system can adopt modularized container equipment or skid-mounted equipment which is convenient to move, so that the on-site constructioncost can be greatly reduced, the construction period can be greatly shortened, and the remediation efficiency is improved. The system is simple and ingenious in structure, easy and convenient to operate, low in equipment investment cost, small in occupied area, particularly suitable for remediation projects of small contaminated sites, capable of achieving multi-equipment parallel operation, suitable for treatment of medium and large sites, wide in application range, good in effect and wider in application prospect.

The invention discloses a heating furnace for heating an annular component. The heating furnace comprises a furnace body, a heating medium driving component, a supporting piece, a flow guiding component and a hollow cylindrical body. A part of heat media in the heating furnace is sprayed on the outer peripheral surface of the annular component through the flow guiding component, and the other part of the heat media flows through an inner cavity of the hollow cylindrical body and is blown to the inner peripheral surfaces of bearings through a second heat medium channel on the hollow cylindrical body so that the inner peripheral surfaces of the bearings can be heated. Thus, the hollow cylindrical body has an effect of dividing a gas flow to a certain extent, and the upper end surface of the hollow cylindrical body is of a sealed structure, so that the flowing gas flow is completely converted into an effective heat exchange gas flow and limited in heat exchange spaces on the surfaces of the bearings. The high reynolds number of the gas flow in heat exchange areas of the bearings as well as the high heat exchange speed of the surfaces of the bearings and the gas flow are obtained, the flow speed is multiplied at the same volume flow rate, and the flowing gas flow is completely converted into the effective heat exchange gas flow; and at the same flow speed, the volume flow rate is decreased substantially, the temperature raising speed of the gas flow is multiplied, thus, the heating efficacy is improved, and the power of a electric heater is decreased greatly.

An apparatus for operably connecting an electrical source to a conductive coating or film. The apparatus may include a substrate made of a structural material. A conductive coating or thin film may be applied to the substrate. An interface layer may be applied over the conductive coating and conduct electricity thereto while transferring insufficient force to separate the conductive coating from the substrate. A conductor, for providing electricity to the interface layer comprising strands configured to be separable and electrically conductive, may be positioned in contact with the interface layer. A clamping mechanism may apply a clamping load urging the conductor toward the conductive coating. The strands of the conductor may be formed to distribute mechanical stress and strain induced by thermal expansion and the clamping load sufficiently to substantially reduce damage to the mechanical and electrical integrity of the conductive coating.