CN205748872U - A wind field simulator for ocean engineering model tests - Google Patents

Abstract

The utility model relates to the technical field of ocean engineering, in particular to a wind field simulation device for ocean engineering model tests, which comprises a fan array device and a measurement and control system, wherein the fan array device comprises an inlet section, a power section, a rectifying section, a downward bending contraction transition section and a stable outlet section, all the sections are connected with each other by flanges, and a sealing rubber pad is arranged at the joint of the flanges; the measurement and control system comprises a pitot tube of a stable outlet section, a fan set and a motor set of a power section, and further comprises an external micro differential pressure transmitter, a frequency converter, a data acquisition card and an industrial personal computer, wherein the pitot tube of the stable outlet section is connected to the input end of the external micro differential pressure transmitter through a hollow hose, the output end of the micro differential pressure transmitter is sequentially connected with the external data acquisition card and the industrial personal computer through signal lines, and the external data acquisition card is sequentially connected with the external frequency converter, the motor set and the fan set of the power section through wires. The utility model discloses it is high to make wind quality, and the cost is far less than the wind-tunnel, and its convenience and suitability are stronger, have positive impetus to the development of ocean engineering technique.

Description

A wind field simulator for ocean engineering model tests

technical field

The utility model relates to a wind field simulation device used for ocean engineering model tests, which belongs to the technical field of ocean engineering.

Background technique

Ocean engineering structures, such as offshore oil production platforms and offshore wind turbines, have been subjected to complex environmental loads of wind, waves, and currents for a long time. The related research relies more on wave pool model tests, and the accuracy and reliability of model test results are not related to the environment. The load simulation device is closely related, and the wind load simulation device is one of the very important environmental load simulation devices.

For the simulation of wind load in the marine environment, two basic methods are usually used. One method is wind tunnel simulation, such as Harbin Institute of Technology Wind Tunnel Wave Trough Joint Laboratory. Wind tunnels can simulate high-quality wind fields, but their defects It is manifested in (1) the cost of wind tunnel construction and model test is very high; (2) the dynamic response of the structure is often distorted because the overall wind generation will interfere with the free surface motion of the wave; another method is the simple Simulation of wind-generating devices, consisting of one or more groups of fans to form a fan array, placed on the poolside or on a trailer, close to the test model for local wind-generating, for simple wind-generating devices, the representative one is the one described in the literature [1] The defect of the device is that there is no rectification measure, poor quality, high noise, interference from the pool bank, and no measurement and control system; later, the literature [2] made further improvements and added a rectification device, but because there is no contraction section and muffler, the wind speed drops very much. Fast, high energy consumption, high noise, and no measurement and control system;

[1] Hyunkyoung Shin, Pham Thanh Dam, Kwang Jin Jung etc. Model test of new floating offshore wind turbine platforms, Int. J. Naval Archit. Ocean Eng. (2013) 5:199～209. http://dx.doi .org/10.2478/IJNAOE-2013-0127

[2] Zhao Yongsheng, He Yanping, Yang Jianmin, Gu Mintong. Wind generating device for model test of offshore floating wind turbine pool, Shanghai Jiaotong University. Application number: 201410152889.5 Application date: 2014-04-16

Contents of the invention

In order to solve the above-mentioned problems in the prior art, the purpose of the utility model is to provide a wind field simulation device for ocean engineering model tests. The device is equipped with a muffler in the power section, which can effectively reduce the noise of the fan. The use of the downward-bending contraction transition section can effectively eliminate the interference of the pool bank on the simulated wind field, so that the airflow from the rectification section can be evenly accelerated, and the flow field quality of the outlet section can be improved. , using the measurement and control system, the API wind spectrum and vertical gradient wind of the simulated marine environment can be realized.

In order to achieve the purpose of the above invention and solve the existing problems in the prior art, the technical solution adopted by the utility model is: a wind field simulation device for marine engineering model tests, including a fan array device and a measurement and control system, the fan The array device includes an inlet section, a power section, a rectification section, a downward bending contraction transition section and a stable outlet section, wherein, the shape of the inlet section, the power section, the rectification section and the stable outlet section are all rectangular cylinders with equal cross-sections, and are all It is set horizontally, and the shape of the downward bending contraction transition section is an irregular rectangular cylinder. The fan array formed by the bottom fan units, each fan unit is composed of 5 fans, and each fan in the fan array is attached with a motor, and each layer has 5 motors as a group to form the upper, middle and lower motor units. A muffler is installed near the rectifying section; honeycomb and damping net are installed inside the rectifying section, and the damping net is placed downstream of the honeycomb to direct the airflow and reduce turbulence, and the side wall of the stable outlet section is uniform along the vertical direction The upper, middle, and bottom pitot tubes are set, and the sections are connected to each other by flanges, and sealing rubber pads are provided at the flange joints; the measurement and control system includes the upper, middle, and bottom pitot tubes of the stable outlet section, and the power The upper, middle, and bottom fan units and the upper, middle, and bottom motor units of the upper, middle, and bottom sections also include externally connected upper, middle, and bottom micro-pressure transmitters, upper, middle, and bottom frequency converters, data acquisition cards, and industrial computers. The upper, middle, and bottom pitot tubes of the stable outlet section are connected to the input ends of the external upper, middle, and bottom micro-pressure differential transmitters through hollow hoses, and the output ends of the upper, middle, and bottom micro-pressure differential transmitters are respectively passed through The signal line is connected to the external data acquisition card and the industrial computer in sequence, and the external data acquisition card is respectively connected to the external upper, middle, and bottom frequency converters, the upper, middle, and bottom motor units of the power section, and the upper, middle, and bottom fan units through wires. Connect sequentially.

The downward bending angle of the downward bending contraction transition section is 20-30°, which is used to eliminate the interference of the pool bank on the simulated wind field.

The ratio of the rectangular cross-sectional area of the air outlet end to the air inlet end of the downwardly curved contraction transition section is 1:1.4-1.6.

The honeycomb is a regular hexagonal lattice structure, and the ratio of radius to side length is 1:4.5-5.5.

The damping net is a stainless steel wire net with a mesh density of 15-24 mesh.

The horizontal axis of the stable outlet section is 0.15-0.3m lower than the horizontal axes of the inlet section, power section and rectification section.

The beneficial effects of the utility model are: a wind field simulation device used for ocean engineering model tests, including a fan array device and a measurement and control system, and the fan array device includes an inlet section, a power section, a rectification section, a downward bending contraction transition section and Stable outlet section, wherein, the shape of the inlet section, the power section, the rectification section and the stable outlet section are all rectangular cylinders with equal cross-sections, and they are all arranged horizontally, and the shape of the downwardly curved contraction transition section is an irregular rectangular cylinder Body, the air inlet end and the air outlet end are rectangular cross-sections, and the upper, lower, and two sides are curved surfaces. The power section is equipped with a fan array composed of upper, middle, and bottom fan units. Each fan unit is composed of 5 fans. Each fan in the fan array is equipped with a motor, and 5 motors on each floor form a group to form the upper, middle and bottom motor units, and a muffler is installed near the rectification section; the honeycomb and Damping net, the damping net is placed downstream of the honeycomb to direct the air flow and reduce the degree of turbulence. The side wall of the stable outlet section is evenly arranged with upper, middle and bottom Pitot tubes along the vertical direction, and each section is interconnected by flanges. connection, and a sealing rubber pad is provided at the flange connection; the measurement and control system includes the upper, middle and bottom pitot tubes of the stable outlet section, the upper, middle and bottom fan units and the upper, middle and bottom motor units of the power section, In addition, it also includes externally connected upper, middle, and bottom micro-pressure transmitters, upper, middle, and bottom frequency converters, data acquisition cards and industrial computers, and the upper, middle, and bottom pitot tubes of the stable outlet section are connected to the The input terminals of the upper, middle and bottom micro-pressure differential transmitters are externally connected, and the output terminals of the upper, middle and bottom micro-pressure differential transmitters are respectively connected to the external data acquisition card and the industrial computer through signal lines in sequence, and the external data acquisition The card is respectively connected with the external upper, middle and bottom frequency converters, the upper, middle and bottom motor units of the power section and the upper, middle and bottom fan units in sequence through wires. Compared with the prior art, the wind generation quality of the utility model is high, and the cost is much lower than that of a wind tunnel, so its convenience and applicability are strong, and it has a positive role in promoting the development of marine engineering technology.

Description of drawings

Fig. 1 is a side view sectional structure schematic diagram of the utility model.

Fig. 2 is a schematic diagram of a top view sectional structure of the utility model.

Fig. 3 is a layout diagram of the fan array in the utility model.

Fig. 4 is a structural block diagram of the measurement and control system in the utility model.

In the figure: 1. Entrance section, 2. Power section, 3. Rectification section, 4. Downward bending contraction transition section, 5. Stable outlet section, 6. Muffler, 7. Upper fan unit, 7a, Middle fan unit, 7b, Bottom fan unit, 8, upper motor unit, 8a, middle motor unit, 8b, bottom motor unit, 9, honeycomb device, 10, damping net, 11, upper pitot tube, 11a, middle pitot tube, 11b, bottom pitot tube.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figures 1, 2, 3, and 4, a wind field simulator for ocean engineering model tests includes a fan array device and a measurement and control system. The fan array device includes an inlet section 1, a power section 2, and a rectification section 3. The downward bending contraction transition section 4 and the stable outlet section 5, the shape of the inlet section 1, the power section 2, the rectification section 3 and the stable outlet section 5 are all rectangular cylinders with equal cross-sections, and are all arranged horizontally, wherein, The entrance section 1 is 0.3m long, 3.8m wide, and 2.4m high; the power section 2 and rectification section 3 are both 1.5m long, 3.8m wide, and 2.4m high; The shape of 4 is an irregular rectangular cylinder, the air inlet end and the air outlet end are rectangular cross-sections, the upper and lower sides and both sides are curved surfaces, the air inlet end is 3.8m wide and 2.4m high, and the air outlet end is 3.0m wide and high 2.0m, the inside of the power section 2 is equipped with a fan array composed of upper, middle and bottom fan units 7, 7a, 7b, each fan adopts a 6-blade fan with a diameter of 0.7m, and each layer of fan units consists of Composed of 5 fans, each fan in the fan array is equipped with a motor, all of which are three-phase asynchronous AC motors, each with a power of 5.5KW, and 5 motors on each floor form a group to form the upper, middle and bottom motors Groups 8, 8a, 8b have a muffler 6 installed near the rectifying section 3; a honeycomb 9 and a damping net 10 are installed inside the rectifying section 3, and the damping net 10 is placed downstream of the honeycomb 9 with a spacing of 0.2m. For directing the airflow and reducing the degree of turbulence, the side walls of the stable outlet section 5 are uniformly arranged with upper, middle, and bottom pitot tubes 11, 11a, 11b along the vertical direction, and the sections are connected to each other by flanges. Sealing rubber pads are provided at the blue connection; the measurement and control system includes the upper, middle and bottom pitot tubes 11, 11a, 11b of the stable outlet section 5, the upper, middle, and bottom fan units 7, 7a, 7b and upper , middle and bottom motor units 8, 8a, 8b, and also include externally connected upper, middle and bottom micro-pressure differential transmitters, upper, middle and bottom frequency converters, data acquisition cards and industrial computers, and the stable outlet section 5 The upper, middle, and bottom pitot tubes 11, 11a, 11b are connected to the input ends of the external upper, middle, and bottom micro-pressure differential transmitters through hollow hoses, and the output ends of the upper, middle, and bottom micro-pressure differential transmitters are respectively passed through The signal line is connected with the external data acquisition card and the industrial computer in turn, and the external data acquisition card is respectively connected with the upper, middle and bottom frequency converters of the external connection, the upper, middle and bottom motor groups 8, 8a, 8b of the power section and the upper and lower floors through wires. The middle and bottom fan units 7, 7a, 7b are connected in sequence. The specific working process is as follows: when the wind load simulation device is in use, connect the main circuit of the ventilation load simulation device, power on the external upper, middle and bottom frequency converters, and start the upper, middle and bottom motor units 8, 8a, 8b and the upper and lower The middle and bottom pitot tubes 11, 11a, 11b convert the wind field measurement information from the external upper, middle and bottom micro pressure difference transmitters into voltage signals, send them to the external data acquisition card, and transmit them to the external industrial computer after processing. Monitor and control the running status, and feed back to the external upper, middle and bottom frequency converters according to the set value, and change the frequency through the signal reception of the frequency converter, and the whole control system continuously receives feedback, so as to realize the wind load characteristics required by the test. The downward bending angle of the downward bending contraction transition section is 30°, which is used to eliminate the interference of the pool bank on the simulated wind field. The honeycomb 9 is a regular hexagonal lattice structure, and the ratio of radius to side length is 1:5. The damping net 10 is a stainless steel wire mesh with a mesh density of 18 meshes, and the horizontal axis of the stable outlet section 5 is 0.2m lower than the horizontal axes of the inlet section 1, the power section 2, and the rectification section 3.

The utility model has the advantages that: a wind field simulation device used for ocean engineering model tests has high wind quality, and the cost is much lower than that of a wind tunnel, so its convenience and applicability are strong, and it has a positive effect on the development of ocean engineering technology. impetus.

Claims (6)

1. for a simulation of wind device for ocean engineering model test, including blower fan battle array device and TT&C system, its feature Be: described blower fan battle array device include entrance, power section, rectification section, under curved contraction changeover portion and stabilization of export section, wherein, The shape of described entrance, power section, rectification section and stabilization of export section is uiform section rectangular cylinder, and is and is horizontally disposed with, Under described, be shaped as irregular rectangular cylinder, inlet end and the outlet side of curved contraction changeover portion are square-section, top and bottom and Both sides are curved surface, and described power section is internally installed upper, the blower fan battle array of middle and bottom layers blower fan group composition, and every layer of blower fan group is by 5 typhoons Machine forms, and the every Fans in blower fan battle array all attaches a motor, and every layer of 5 motor are one group, in composition, middle and bottom layers Motor unit, is being provided with acoustic filter near rectification section position；Described rectification section is internally installed honeycomb and damping screen, damping Net is placed on honeycomb downstream, is used for leading straight air-flow, reducing turbulivity, and described stabilization of export section sidewall the most uniformly sets Put, middle and bottom layers pitot tube, described each section is connected with each other by flange, and is provided with sealing rubber pad at flange connections；Described TT&C system includes upper, the middle and bottom layers pitot tube of stabilization of export section, upper, the middle and bottom layers blower fan group of power section and upper, middle and bottom layers Motor unit, additionally include outer connect, middle and bottom layers micro-pressure-difference transmitter, upper, middle and bottom layers converter, data collecting card and work Control machine, upper, the middle and bottom layers pitot tube of described stabilization of export section are connected outside being connected to by hollow hoses, middle and bottom layers micro-pressure-difference becomes Sending device input, described upper, middle and bottom layers micro-pressure-difference transmitter outfan is respectively by holding wire and external data capture card and work Control machine is sequentially connected with, described external data capture card by wire respectively with connect outward, middle and bottom layers converter, power section upper, Middle and bottom layers motor unit and upper, middle and bottom layers blower fan group are sequentially connected with.

A kind of simulation of wind device for ocean engineering model test, it is characterised in that: described Under the lower bending angle of curved contraction changeover portion be 20-30 °, for getting rid of the interference to modeling wind field of the pond bank.

A kind of simulation of wind device for ocean engineering model test, it is characterised in that: described Under curved contraction changeover portion outlet side and inlet end square-section area ratio be 1:1.4-1.6.

A kind of simulation of wind device for ocean engineering model test, it is characterised in that: described Honeycomb is regular hexagon trellis, and radius and side ratio are 1:4.5-5.5.

A kind of simulation of wind device for ocean engineering model test, it is characterised in that: described Damping screen is stainless steel cloth, and reticular density is 15-24 mesh.

A kind of simulation of wind device for ocean engineering model test, it is characterised in that: described Stabilization of export section horizontal axis entrance to be less than, power section, the horizontal axis 0.15-0.3m of rectification section.