Nozzle structure for a climate wind tunnel and climate wind tunnel

Abstract

The application discloses a nozzle structure of a climate wind tunnel and the climate wind tunnel. The nozzle structure of the climate wind tunnel comprises an annular frame body and a flow guide assembly. The annular frame body defines an air duct extending in a first direction. The flow guide assembly is arranged in the air duct and comprises a plurality of flow guide plates. The plurality of flow guide plates are arranged at intervals in a second direction perpendicular to the first direction. The flow guide plates are arranged obliquely relative to the first direction. The nozzle structure of the climate wind tunnel avoids direct air flow into a test space, and better realizes simulation of meteorological conditions such as high and low temperature, freezing rain, snowfall and icing.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of artificial simulation of meteorological environment, and in particular to a nozzle structure of a climate wind tunnel and a climate wind tunnel having the nozzle structure. BACKGROUND

[0002] The climate wind tunnel is a low-speed wind tunnel device that can realize simulation of meteorological conditions such as high and low temperature, freezing rain, snowfall, and icing. The present application designs a nozzle structure of a climate wind tunnel, which is suitable for high and low temperature testing and rain and snow testing of the climate wind tunnel. In the climate wind tunnel, the realization of high and low temperature inside the testing space is usually achieved by blowing high and low temperature air into the testing space through the air blown out of the climate wind tunnel, and the realization of snowfall or freezing rain inside the testing space of the climate wind tunnel is usually achieved by spraying atomized droplets through the spray device at the nozzle when the low-temperature air is blown out of the nozzle.

[0003] In the prior art, the nozzle of the climate wind tunnel is an equal straight cross-section nozzle, which leads to uneven temperature distribution in the testing space under high and low temperature testing conditions, and the tested object cannot obtain a uniform and stable temperature testing area. When creating a rain and snow environment, the atomized droplets have a shortened drift trajectory, and the atomized droplets cannot be sufficiently cooled, which cannot create a rain and snow environment in the entire testing space, and there is room for improvement. SUMMARY

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a nozzle structure of a climate wind tunnel, which avoids direct blowing of air into the testing space and better realizes simulation of meteorological conditions such as high and low temperature, freezing rain, snowfall, and icing.

[0005] The present application further provides a climate wind tunnel.

[0006] The nozzle structure of the climate wind tunnel according to the present application comprises: a ring-shaped frame body, which defines an air duct extending in a first direction inside the ring-shaped frame body; and a flow guide assembly, which is arranged in the air duct and comprises a plurality of flow guide pieces, the plurality of flow guide pieces are arranged at intervals in a second direction perpendicular to the first direction, and the flow guide pieces are arranged obliquely with respect to the first direction.

[0007] The nozzle structure of the climate wind tunnel according to the present application avoids direct blowing of air into the testing space and better realizes simulation of meteorological conditions such as high and low temperature, freezing rain, snowfall, and icing.

[0008] In some examples of the present application, the second direction is a radial direction of an imaginary circle with the center of the ring-shaped frame as the center, and a plurality of the flow guides are arranged around the center of the ring-shaped frame, and the flow guides are inclined and extend in the first direction from inside to outside in a direction away from the center of the ring-shaped frame.

[0009] In some examples of the present application, the ring-shaped frame includes a first side frame, a second side frame, a third side frame, and a fourth side frame, two ends of the first side frame are respectively connected to one end of the third side frame and one end of the fourth side frame, and two ends of the second side frame are respectively connected to the other end of the third side frame and the other end of the fourth side frame.

[0010] In some examples of the present application, the flow guide includes a first flow guide portion, a second flow guide portion, a third flow guide portion, and a fourth flow guide portion, two ends of the length direction of the first flow guide portion are respectively connected to one end of the length direction of the third flow guide portion and one end of the length direction of the fourth flow guide portion, two ends of the length direction of the second flow guide portion are respectively connected to the other end of the length direction of the third flow guide portion and the other end of the length direction of the fourth flow guide portion, and the width direction of each of the first flow guide portion, the second flow guide portion, the third flow guide portion, and the fourth flow guide portion is inclined relative to the first direction.

[0011] In some examples of the present application, the length direction of the first flow guide portion is parallel to the first side frame, and the width direction of the first flow guide portion is inclined and extends in the first direction from inside to outside in a direction close to the first side frame.

[0012] The length direction of the second flow guide portion is parallel to the second side frame, and the width direction of the second flow guide portion is inclined and extends in the first direction from inside to outside in a direction close to the second side frame.

[0013] The length direction of the third flow guide portion is parallel to the third side frame, and the width direction of the third flow guide portion is inclined and extends in the first direction from inside to outside in a direction close to the third side frame.

[0014] The length direction of the fourth flow guide portion is parallel to the fourth side frame, and the width direction of the fourth flow guide portion is inclined and extends in the first direction from inside to outside in a direction close to the fourth side frame.

[0015] In some examples of the present application, the number of flow guides is 6-10.

[0016] In some examples of the present application, the included angle between the width direction of the flow guide and the first direction is 30°-60°.

[0017] In some examples of the present application, the second direction extends in the up-down direction, and the flow guide is inclined and extends downward in the first direction from inside to outside.

[0018] In some examples of the present application, the guide vane comprises a fifth guide portion and a sixth guide portion arranged in a third direction, the third direction being perpendicular to the first direction and the second direction, one end of the length direction of the fifth guide portion being connected to one end of the length direction of the sixth guide portion;

[0019] wherein the length direction of the fifth guide portion and the length direction of the sixth guide portion extend downwardly in a direction close to each other, and the width direction of each of the fifth guide portion and the sixth guide portion extend downwardly from inside to outside along the first direction.

[0020] In some examples of the present application, the fifth guide portion and the sixth guide portion are symmetrically arranged on a center line of the annular frame body extending in the up-down direction, the other end of the length direction of the fifth guide portion and the other end of the length direction of the sixth guide portion being connected to the annular frame body.

[0021] In some examples of the present application, the included angle between the length direction of the fifth guide portion and / or the sixth guide portion and the horizontal plane is 30°-45°.

[0022] In some examples of the present application, the included angle between the extension direction of the intersection line of the fifth guide portion and the sixth guide portion and the horizontal plane is 30°-60°.

[0023] In some examples of the present application, the number of the guide vanes is 15-20.

[0024] In some examples of the present application, the nozzle structure of the climate wind tunnel further comprises:

[0025] A connecting piece, the connecting piece being fixedly connected with the annular frame body, and the guide assembly being fixedly arranged on the annular frame body through the connecting piece.

[0026] In some examples of the present application, the lower ends of the annular frame body are provided with fixed bases, and the nozzle structure is adapted to be detachably arranged at the air outlet of the climate wind tunnel through the fixed bases.

[0027] According to the climate wind tunnel of the present application, a spraying device is used to spray atomized liquid droplets to the nozzle structure.

[0028] Additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, taken in conjunction with the following drawings of which:

[0030] Figure 1 is a structural schematic diagram of a nozzle structure according to an embodiment of the present application;

[0031] Figure 2 is a structural schematic diagram of a nozzle structure according to an embodiment of the present application;

[0032] Figure 3 is Figure 2 a sectional view at G-G.

[0033] Reference Signs:

[0034] Nozzle structure 100, annular frame 10, center O of the annular frame, first side frame 11, second side frame 12, third side frame 13, fourth side frame 14, flow guide assembly 20, flow guide vane 2, first flow guide part 21, second flow guide part 22, third flow guide part 23, fourth flow guide part 24, fifth flow guide part and 25, sixth flow guide part 26, fixed base 30. DETAILED DESCRIPTION

[0035] Embodiments of the present application are described in detail below with reference to the attached drawings, which show by way of example, embodiments in which like numerals indicate like elements or elements having the same or similar function throughout the several figures of the drawings. Embodiments described below are exemplary only, and are not to be construed as limiting the present application.

[0036] A climatic wind tunnel is a low-speed wind tunnel device that can realize simulation of meteorological conditions such as high and low temperature, freezing rain, snowfall, and icing. The present application designs a nozzle structure 100 for a climatic wind tunnel, which is suitable for high and low temperature testing and snow and rain testing of the climatic wind tunnel. In the climatic wind tunnel, the high and low temperature inside the testing space is usually realized by blowing high and low temperature air into the testing space to adjust the temperature inside the testing space, and the snowfall or freezing rain inside the testing space is usually realized by blowing low temperature air into the nozzle and encountering the atomized droplets sprayed by the spray device at the nozzle.

[0037] In the prior art, the nozzle of the climatic wind tunnel is a straight cross-section nozzle, which results in uneven temperature distribution in the testing space under high and low temperature testing conditions, and the tested object cannot obtain a uniform and stable temperature testing area. When creating a snow and rain environment, the atomized droplets have a shortened drift trajectory, and the atomized droplets are not sufficiently cooled, which cannot create a snow and rain environment in the entire testing space.

[0038] To this end, the embodiment of the present application designs a nozzle structure 100 of a climate wind tunnel for high-low temperature test and a nozzle structure 100 of a climate wind tunnel for rain and snow test, so that in the high-low temperature test working condition, the temperature distribution in the test space is uniform, and the tested piece can obtain a uniform and stable temperature test area, and when the rain and snow environment is created, the drift trajectory of the atomized droplets is longer, the atomized droplets are cooled more fully, and the rain and snow environment can be created in the entire test space.

[0039] Reference will be made to Figures 1-3 The nozzle structure 100 of the climate wind tunnel according to the embodiment of the present application is described below.

[0040] The nozzle structure 100 of the climate wind tunnel according to the embodiment of the present application can include a ring-shaped frame body 10 and a flow guide assembly 20.

[0041] As shown in Figure 1 and Figure 2 , the ring-shaped frame body 10 defines an air duct extending in a first direction (e.g., the A-B direction shown in Figures 1-3 ), and the flow guide assembly 20 is arranged in the air duct to guide the airflow passing through the air duct so that the airflow can flow in a predetermined direction. The air duct defined by the ring-shaped frame body 10 is in communication with the air outlet duct of the wind tunnel, that is, the high-low temperature airflow blown from the inside of the wind tunnel passes through the air duct defined by the ring-shaped frame body 10 and is blown into the test space after being guided in the air duct.

[0042] The flow guide assembly 20 includes a plurality of flow guide plates 2, which are arranged in a second direction perpendicular to the first direction to allow the airflow to pass through the gap between the flow guide plates 2 and change the flow direction during the passing process, thereby achieving the flow guidance of the airflow. The flow guide plates 2 are arranged obliquely relative to the first direction to avoid the airflow directly blowing to the test space and guide the airflow to different directions, so that in the high-low temperature test working condition, the airflow passing through the nozzle structure 100 can form an airflow diffusion angle, increase the area of the high-low temperature airflow diffusing into the test space, and realize the uniform change of the temperature in the entire test space, and in the rain and snow test working condition, the airflow directly blowing to the atomized droplets is reduced, the drift trajectory of the atomized droplets is longer, the atomized droplets are cooled more fully, and the rain and snow environment can be created in the entire test space.

[0043] The nozzle structure 100 of the climate wind tunnel according to the embodiment of the present application avoids the airflow directly blowing into the test space, and better realizes the simulation of meteorological conditions such as high-low temperature, freezing rain, snowfall, and icing.

[0044] As shown in Figure 1As shown, the second direction is the radial direction of the imaginary circle with the center O of the annular frame as the center, the plurality of guide vanes 2 are arranged around the center O of the annular frame, and the guide vanes 2 are inclined and extend in the direction away from the center O of the annular frame from inside to outside along the first direction, so that the airflow passing through the nozzle structure 100 is uniformly diffused from the center to the periphery, the airflow passing through the nozzle structure 100 can form an airflow diffusion angle, increase the area of the high and low temperature airflow diffused into the test space, and realize uniform temperature change of the entire test space. The nozzle structure 100 can be suitable for high and low temperature test working conditions.

[0045] In some embodiments, the annular frame 10 is formed into a circular ring shape, the guide vane 2 is also formed into a circular ring shape, and the guide vane 2 is inclined in the direction away from the center of the annular frame 10 from inside to outside along the first direction, so that the airflow passing through the nozzle structure 100 is uniformly diffused from the center to the periphery, the airflow passing through the nozzle structure 100 can form an airflow diffusion angle, increase the area of the high and low temperature airflow diffused into the test space, and realize uniform temperature change of the entire test space. The nozzle structure 100 can be suitable for high and low temperature test working conditions.

[0046] In some embodiments, the annular frame 10 is formed into a circular ring shape, the guide vane 2 is also formed into a circular ring shape, and the guide vane 2 is inclined in the direction away from the center of the annular frame 10 from inside to outside along the first direction, so that the airflow passing through the nozzle structure 100 is uniformly diffused from the center to the periphery, the airflow passing through the nozzle structure 100 can form an airflow diffusion angle, increase the area of the high and low temperature airflow diffused into the test space, and realize uniform temperature change of the entire test space. The nozzle structure 100 can be suitable for high and low temperature test working conditions.

[0047] Referring to Figure 1 , the annular frame 10 includes a first side frame 11, a second side frame 12, a third side frame 13 and a fourth side frame 14, the two ends of the first side frame 11 are respectively connected with one end of the third side frame 13 and the fourth side frame 14, and the two ends of the second side frame 12 are respectively connected with the other end of the third side frame 13 and the fourth side frame 14, so that the annular frame 10 composed of the first side frame 11, the second side frame 12, the third side frame 13 and the fourth side frame 14 is formed into a rectangle.

[0048] Among them, the guide vane 2 includes a first guide part 21, a second guide part 22, a third guide part 23 and a fourth guide part 24, the two ends of the length direction of the first guide part 21 are respectively connected with one end of the length direction of the third guide part 23 and one end of the length direction of the fourth guide part 24, and the two ends of the length direction of the second guide part 22 are respectively connected with the other end of the length direction of the third guide part 23 and the other end of the length direction of the fourth guide part 24, so that the guide vane 2 composed of the first guide part 21, the second guide part 22, the third guide part 23 and the fourth guide part 24 is also formed into a rectangle.

[0049] Each of the first flow guide part 21, the second flow guide part 22, the third flow guide part 23 and the fourth flow guide part 24 is arranged obliquely in the width direction relative to the first direction, and the first flow guide part 21, the second flow guide part 22, the third flow guide part 23 and the fourth flow guide part 24 are arranged obliquely in the first direction from inside to outside towards the direction away from the center O of the annular frame body, so that the air flow flowing along the first direction can be inclined to four directions perpendicular to each other on the plane perpendicular to the first direction after passing through the first flow guide part 21, the second flow guide part 22, the third flow guide part 23 and the fourth flow guide part 24.

[0050] The center of the rectangle formed by the first flow guide part 21, the second flow guide part 22, the third flow guide part 23 and the fourth flow guide part 24 coincides with the center of the rectangle formed by the first frame 11, the second frame 12, the third frame 13 and the fourth frame 14.

[0051] In some embodiments, as shown in Figure 1 The length direction of the first flow guide part 21 is parallel to the first frame 11, and the width direction of the first flow guide part 21 is obliquely extended from inside to outside along the first direction towards the direction close to the first frame 11. The length direction of the second flow guide part 22 is parallel to the second frame 12, and the width direction of the second flow guide part 22 is obliquely extended from inside to outside along the first direction towards the direction close to the second frame 12. The length direction of the third flow guide part 23 is parallel to the third frame 13, and the width direction of the third flow guide part 23 is obliquely extended from inside to outside along the first direction towards the direction close to the third frame 13. The length direction of the fourth flow guide part 24 is parallel to the fourth frame 14, and the width direction of the fourth flow guide part 24 is obliquely extended from inside to outside along the first direction towards the direction close to the fourth frame 14.

[0052] By making the length direction of the first flow guide part 21 parallel to the first frame 11, the length direction of the second flow guide part 22 parallel to the second frame 12, the length direction of the third flow guide part 23 parallel to the third frame 13, and the length direction of the fourth flow guide part 24 parallel to the fourth frame 14, it is ensured that the flow guide sheet 2 is uniformly distributed in the annular frame body 10, so that as much air flow as possible passing through the air duct formed by the annular frame body 10 passes through the flow guide sheet 2, the area of the high and low temperature air flow diffusing into the test space is increased, and the temperature of the entire test space is uniformly changed.

[0053] Specifically, referring to Figure 1The first frame 11 and the second frame 12 extend in the up-down direction, and the third frame 13 and the fourth frame 14 extend in the left-right direction. When the airflow passes through the gaps between the guide vanes 2 of the nozzle structure 100, the airflow passing through the gap between the first guide portions 21 of adjacent two guide vanes 2 will flow obliquely to the left in the first direction under the guidance of the first guide portions 21, the airflow passing through the gap between the second guide portions 22 of adjacent two guide vanes 2 will flow obliquely to the right in the first direction under the guidance of the second guide portions 22, the airflow passing through the gap between the third guide portions 23 of adjacent two guide vanes 2 will flow obliquely upward in the first direction under the guidance of the third guide portions 23, and the airflow passing through the gap between the fourth guide portions 24 of adjacent two guide vanes 2 will flow obliquely downward in the first direction under the guidance of the fourth guide portions 24.

[0054] In some examples of the present application, the number of guide vanes 2 is 6-10. Optionally, the number of guide vanes 2 can be 6, 7, 8, 9 or 10. In this way, the uniformity of the airflow can be ensured while avoiding excessive airflow resistance loss caused by excessive density of the guide vanes 2, and reducing the wind pressure on the nozzle structure 100.

[0055] In some examples of the present application, the angle between the width direction of the guide vane 2 and the first direction is 30°-60°. Limiting the angle between the width direction of the guide vane 2 and the first direction to 30°-60° can avoid airflow loss caused by large inclination angle and reduce the wind pressure on the nozzle structure 100, and avoid small diffusion angle of the airflow caused by small inclination angle, thereby ensuring the uniform diffusion of high and low temperature airflows.

[0056] In some examples of the present application, the length direction of the first guide portion 21, the second guide portion 22, the third guide portion 23 and the fourth guide portion 24 is not parallel to the first frame 11, the second frame 12, the third frame 13 and the fourth frame 14. In this case, the two ends of the length direction of the first guide portion 21 of the guide vane 2 are respectively connected to one end of the length direction of the third guide portion 23 and one end of the length direction of the fourth guide portion 24, or the extension line of the length direction of the first guide portion 21 of the guide vane 2 intersects with the extension line of the third guide portion 23 and the extension line of the fourth guide portion 24, and the two ends of the length direction of the first guide portion 21 of the guide vane 2 are respectively connected to the first frame and the third frame, and one end of the length direction of the third guide portion 23 is connected to the third frame and one end of the length direction of the fourth guide portion 24 is connected to the first frame.

[0057] The two ends of the length direction of the second guide portion 22 of the guide vane 2 are connected with the other end of the length direction of the third guide portion 23 and the other end of the length direction of the fourth guide portion 24, respectively, or the extension lines of the length direction of the second guide portion 22 of the guide vane 2 intersect with the extension lines of the third guide portion 23 and the fourth guide portion 24, respectively, and the two ends of the length direction of the second guide portion 22 of the guide vane 2 are connected with the second frame body and the fourth frame body, respectively, the other end of the length direction of the third guide portion 23 is connected with the second frame body, and the other end of the length direction of the fourth guide portion 24 is connected with the fourth frame body.

[0058] As shown in Figure 2 and Figure 3 , the second direction (the C-D direction shown in Figures 2-3 ) extends along the up-down direction, that is, the guide vanes 2 are uniformly distributed along the up-down direction, and the guide vanes 2 extend downwardly and obliquely along the first direction from inside to outside. Thus, the airflow passing through the nozzle structure 100 is sprayed downwardly and obliquely along the first direction under the guidance of the guide vanes 2, and the nozzle structure is suitable for rain and snow test working conditions.

[0059] Thus, in the rain and snow test working conditions, the forward drag of the airflow on the atomized droplets sprayed by the spray device is reduced, and an upward airflow can also be generated at a certain distance in front of the nozzle structure 100, further increasing the heat exchange time of the airflow and the atomized droplets, and thus realizing the uniform distribution of rain and snow in the entire test space.

[0060] In some examples of the present application, the guide vane 2 includes a fifth guide portion and a sixth guide portion 26 arranged in a third direction (the E-F direction shown in Figure 2 ), the third direction being perpendicular to the first direction and the second direction, the third direction being the left-right direction in the figure, one end of the length direction of the fifth guide portion being connected with one end of the length direction of the sixth guide portion 26, as shown in Figure 2 , the fifth guide portion is located on the left side, and the sixth guide portion 26 is located on the right side, and one end of the length direction of the fifth guide portion on the right side is connected with one end of the length direction of the sixth guide portion 26 on the left side.

[0061] Among them, the length direction of the fifth guide portion and the sixth guide portion 26 extends downwardly and obliquely in a direction close to each other, and the width direction of each of the fifth guide portion and the sixth guide portion 26 extends downwardly and obliquely along the first direction from inside to outside. That is, the fifth guide portion of all the guide vanes 2 guides the airflow to the lower left of the first direction, and the sixth guide portion 26 of all the guide vanes 2 guides the airflow to the lower right of the first direction.

[0062] Therefore, not only can the air flow downward, reduce the air flow to the spray device sprayed mist droplets forward drag, at a distance from the nozzle structure 100 forward to create a rising air flow, further increase the heat exchange time of the air flow and the mist droplets, and further realize the uniform distribution of rain and snow in the entire test space, but also can be evenly divided into two parts, one part flows to the left, the other part flows to the right, so that the air flow is evenly distributed in front of the nozzle structure 100, which is beneficial to the heat exchange between the mist droplets and the air flow, and the air flow can flow evenly to the experimental environment, which is beneficial to ensure the uniform temperature in the experimental environment.

[0063] In some examples of the present application, the fifth guide portion and the sixth guide portion 26 are symmetrically arranged on the center line of the annular frame body 10 extending in the up-down direction, thereby ensuring that the air flow through the air duct defined by the annular frame body 10 can be evenly divided into two parts and flow evenly to the left and right sides, which is beneficial to the heat exchange between the mist droplets and the air flow, and the air flow can flow evenly to the experimental environment, which is beneficial to ensure the uniform temperature in the experimental environment.

[0064] The other end of the length direction of the fifth guide portion and the other end of the length direction of the sixth guide portion 26 are connected with the annular frame body 10 to realize the fixation of the guide vane 2.

[0065] In the present application, with reference to Figure 2 The annular frame body 10 includes a first side frame 11, a second side frame 12, a third side frame 13 and a fourth side frame 14, the two ends of the first side frame 11 are respectively connected with one end of the third side frame 13 and the fourth side frame 14, and the two ends of the second side frame 12 are respectively connected with the other end of the third side frame 13 and the fourth side frame 14, thereby forming a rectangle of the annular frame body 10 composed of the first side frame 11, the second side frame 12, the third side frame 13 and the fourth side frame 14.

[0066] In the present application, the guide vane 2 includes a fifth guide portion and a sixth guide portion 26 arranged in the third direction, one end of the length direction of the fifth guide portion is connected with one end of the length direction of the sixth guide portion 26, the other end of the length direction of the fifth guide portion and the other end of the length direction of the sixth guide portion 26 are connected with the annular frame body 10, or the extension line of the length direction of the fifth guide portion intersects with the extension line of the length direction of the sixth guide portion 26, and the intersection point is located outside the rectangular annular frame body 10 composed of the first side frame 11, the second side frame 12, the third side frame 13 and the fourth side frame 14, one end of the length direction of the fifth guide portion and one end of the length direction of the sixth guide portion 26 are connected with the fourth frame body, the other end of the length direction of the fifth guide portion is connected with the first frame body, and the other end of the length direction of the sixth guide portion 26 is connected with the second frame body.

[0067] As Figure 2As shown, the angle between the length direction of the fifth flow guide part 25 and / or the sixth flow guide part 26 and the horizontal plane is 30°-45°. By limiting the angle between the length direction of the fifth flow guide part 25 and / or the sixth flow guide part 26 and the horizontal plane to 30°-45°, the angle between the length direction of the fifth flow guide part 25 and / or the sixth flow guide part 26 and the horizontal plane is not too large, so that the proportion of the airflow on the left and right sides is not too large, and the airflow in the middle part is small, thereby avoiding the edge airflow entraining the middle airflow and ensuring the spray trajectory of the droplets. Also, the angle between the length direction of the fifth flow guide part 25 and / or the sixth flow guide part 26 and the horizontal plane is not too small, so that the degree of airflow diffusion is low, and the uniform distribution of the droplets in the entire test space is ensured.

[0068] As shown in Figure 3 the extension direction of the intersection line of the fifth flow guide part and the sixth flow guide part 26 and the horizontal plane is 30°-60°. In this way, the airflow can be guided downward by the flow guide sheet 2, and the airflow has sufficient sinking, while avoiding the airflow loss caused by a large inclination angle and reducing the wind pressure on the nozzle structure 100.

[0069] In some examples of the present application, the number of flow guide sheets 2 is 15-20. Optionally, the number of flow guide sheets 2 can be 15, 16, 17, 18, 19, or 20. In this way, the airflow can be uniformly guided out while avoiding excessive airflow resistance loss caused by excessive density of the flow guide sheets 2, and reducing the wind pressure on the nozzle structure 100.

[0070] In some examples of the present application, the nozzle structure 100 of the climate wind tunnel further comprises a connecting piece, the connecting piece is fixedly connected with the annular frame 10, and the flow guide assembly 20 is fixedly arranged on the annular frame 10 through the connecting piece, so as to strengthen the fixation of the flow guide sheet 2 on the annular frame, so that it can withstand higher wind pressure.

[0071] In some embodiments, the connecting piece includes a first steel rope having one end fixedly connected at the connection between the first frame 11 and the third frame 13 and the other end fixedly connected at the connection between the second frame 12 and the fourth frame 14, and a second steel rope having one end fixedly connected at the connection between the first frame 11 and the fourth frame 14 and the other end fixedly connected at the connection between the second frame 12 and the third frame 13.

[0072] Referring to Figure 1 and Figure 2The lower two ends of the annular frame body 10 are provided with a fixed base 30, and the nozzle structure 100 is suitable for being detachably arranged at the air outlet of the climate wind tunnel through the fixed base 30. Since different nozzle structures 100 need to be replaced under different working conditions of the climate wind tunnel, the same fixed base 30 is uniformly designed on the nozzle structures 100 of different structures, so that any nozzle structure 100 can be fixedly arranged at the air outlet of the climate wind tunnel, and the replacement process is convenient, facilitating the change of the experimental environment.

[0073] According to the climate wind tunnel, the spray device is used to spray atomized liquid drops to the nozzle structure 100, and the spray device is started under the rain and snow test working condition.

[0074] The following will be described in combination with Figures 1-3 a specific embodiment of the climate wind tunnel.

[0075] The climate wind tunnel comprises a nozzle structure 100, the nozzle structure 100 comprising an annular frame body 10, a flow guide assembly 20, a connecting piece, a fixed base 30 and a spray device.

[0076] The annular frame body 10 comprises a first side frame 11, a second side frame 12, a third side frame 13 and a fourth side frame 14, the two ends of the first side frame 11 are respectively connected with one end of the third side frame 13 and the fourth side frame 14, and the two ends of the second side frame 12 are respectively connected with the other end of the third side frame 13 and the fourth side frame 14, so that the annular frame body 10 composed of the first side frame 11, the second side frame 12, the third side frame 13 and the fourth side frame 14 is formed into a rectangle.

[0077] The connecting piece is fixedly connected with the annular frame body 10, and the flow guide assembly 20 is fixedly arranged on the annular frame body 10 through the connecting piece, so as to strengthen and fix the flow guide piece 2 on the annular side frame, so that it can withstand higher wind pressure.

[0078] Specifically, the connecting piece comprises a first steel rope fixedly connected at one end to the connection between the first side frame 11 and the third side frame 13 and fixedly connected at the other end to the connection between the second side frame 12 and the fourth side frame 14, and a second steel rope fixedly connected at one end to the connection between the first side frame 11 and the fourth side frame 14 and fixedly connected at the other end to the connection between the second side frame 12 and the third side frame 13.

[0079] The lower two ends of the annular frame body 10 are provided with a fixed base 30, and the nozzle structure 100 is suitable for being detachably arranged at the air outlet of the climate wind tunnel through the fixed base 30. The air outlet of the climate wind tunnel is provided with a matched mounting hole, and a mounting hole is formed on the fixed base 30, and a fixed bolt passes through the mounting hole and the corresponding matched mounting hole to fix the nozzle structure 100 at the air outlet of the climate wind tunnel.

[0080] The climate wind tunnel has two replaceable nozzle structures 100, wherein the first nozzle structure 100 is suitable to be installed at the air outlet of the climate wind tunnel in a high-low temperature test mode, and the second nozzle structure 100 is suitable to be installed at the air outlet of the climate wind tunnel in a rain and snow test mode, a spraying device is used to spray atomized liquid droplets to the nozzle structure 100, and the spraying device is opened in the rain and snow test mode.

[0081] As shown in Figure 1 , the flow guide assembly 20 on the first nozzle structure 100 includes a plurality of flow guide pieces 2, the flow guide pieces 2 include a first flow guide part 21, a second flow guide part 22, a third flow guide part 23 and a fourth flow guide part 24, the two ends of the length direction of the first flow guide part 21 are connected with one end of the length direction of the third flow guide part 23 and one end of the length direction of the fourth flow guide part 24 respectively, and the two ends of the length direction of the second flow guide part 22 are connected with the other end of the length direction of the third flow guide part 23 and the other end of the length direction of the fourth flow guide part 24 respectively.

[0082] Further, the length direction of the first flow guide part 21 is parallel to the first frame 11, and the width direction of the first flow guide part 21 extends obliquely from inside to outside along the first direction towards the first frame 11, the length direction of the second flow guide part 22 is parallel to the second frame 12, and the width direction of the second flow guide part 22 extends obliquely from inside to outside along the first direction towards the second frame 12, the length direction of the third flow guide part 23 is parallel to the third frame 13, and the width direction of the third flow guide part 23 extends obliquely from inside to outside along the first direction towards the third frame 13, and the length direction of the fourth flow guide part 24 is parallel to the fourth frame 14, and the width direction of the fourth flow guide part 24 extends obliquely from inside to outside along the first direction towards the fourth frame 14.

[0083] Specifically, referring to Figure 1 , the first frame 11 and the second frame 12 extend in the up-down direction, the third frame 13 and the fourth frame 14 extend in the left-right direction, when the airflow passes through the gaps between the flow guide pieces 2 of the nozzle structure 100, the airflow will be guided by the flow guide pieces 2, the airflow passing through the gap between the first flow guide parts 21 of two adjacent flow guide pieces 2 will flow obliquely to the left along the first direction under the guidance of the first flow guide parts 21, the airflow passing through the gap between the second flow guide parts 22 of two adjacent flow guide pieces 2 will flow obliquely to the right along the first direction under the guidance of the second flow guide parts 22, the airflow passing through the gap between the third flow guide parts 23 of two adjacent flow guide pieces 2 will flow obliquely upwards along the first direction under the guidance of the third flow guide parts 23, and the airflow passing through the gap between the fourth flow guide parts 24 of two adjacent flow guide pieces 2 will flow obliquely downwards along the first direction under the guidance of the fourth flow guide parts 24.

[0084] The number of the guide vanes 2 is 7, and the included angle between the width direction of the guide vanes 2 and the first direction is 45°, which ensures the uniform diffusion of the high and low temperature airflow.

[0085] Therefore, under the high and low temperature test condition, the airflow of the climate wind tunnel passes through the first nozzle structure 100, which can make the airflow passing through the nozzle structure 100 uniformly diffuse from the center to the periphery, and the airflow passing through the nozzle structure 100 can form an airflow diffusion angle, increase the area of the high and low temperature airflow diffusing into the test space, and realize the uniform temperature change of the whole test space.

[0086] Further, as shown in Figure 2 and Figure 3 , the guide assembly 20 on the second nozzle structure 100 includes a plurality of guide vanes 2, which are uniformly distributed along the up-down direction. The guide vanes 2 include a fifth guide part and a sixth guide part 26 arranged in the third direction (E-F direction as shown in Figure 2 ).

[0087] The length direction of the fifth guide part and the sixth guide part 26 extends downwardly in a direction close to each other, and the width direction of each of the fifth guide part and the sixth guide part 26 extends downwardly from inside to outside along the first direction, so that the fifth guide part of all the guide vanes 2 guides the airflow to the lower left of the first direction, and the sixth guide part 26 of all the guide vanes 2 guides the airflow to the lower right of the first direction.

[0088] The fifth guide part and the sixth guide part 26 are symmetrically arranged on the center line of the annular frame body 10 extending in the up-down direction, so that the airflow passing through the air duct defined by the annular frame body 10 can be uniformly divided into two parts and uniformly flow to the left and right sides, which is beneficial to the heat exchange between the atomized droplets and the airflow, and makes the airflow uniformly flow into the experimental environment, which is beneficial to ensuring the uniform temperature in the experimental environment.

[0089] Further, one end of the length direction of the fifth guide part is connected with one end of the length direction of the sixth guide part 26, the other end of the length direction of the fifth guide part and the other end of the length direction of the sixth guide part 26 are connected with the annular frame body 10, or the extension line of the length direction of the fifth guide part intersects with the extension line of the length direction of the sixth guide part 26, and the intersection point is located outside the annular frame body 10 formed by the rectangle of the first frame 11, the second frame 12, the third frame 13 and the fourth frame 14, one end of the length direction of the fifth guide part and one end of the length direction of the sixth guide part 26 are connected with the fourth frame body, the other end of the length direction of the fifth guide part is connected with the first frame body, and the other end of the length direction of the sixth guide part 26 is connected with the second frame body.

[0090] Therefore, under the rain and snow test condition, the airflow of the climate wind tunnel passes through the second nozzle structure 100, so that the airflow flows downward, reduces the forward drag of the atomized liquid droplets sprayed by the spray device, creates an upward airflow at a certain distance in front of the nozzle structure 100, further increases the heat exchange time of the airflow and the atomized liquid droplets, and further realizes the uniform distribution of the rain and snow in the entire test space. Moreover, the airflow can be evenly divided into two parts, one part flows to the left, and the other part flows to the right, so that the airflow is evenly distributed in front of the nozzle structure 100, which is beneficial to the heat exchange between the atomized liquid droplets and the airflow, and makes the airflow flow evenly to the experimental environment, which is beneficial to ensure the uniform temperature in the experimental environment.

[0091] Other configurations of the climate wind tunnel are known in the art and are well known to those skilled in the art, and therefore, other configurations of the climate wind tunnel are not described in detail here.

[0092] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0093] In the description of the present application, "a plurality of" means two or more.

[0094] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0095] In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixedly connected, can also be detachably connected, or integrally connected; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0096] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A nozzle structure for a climate wind tunnel, characterized in that, include: An annular frame, wherein an air duct extending in a first direction is defined within the annular frame; A flow guiding component is disposed within the air duct and includes multiple flow guiding vanes, the multiple flow guiding vanes being spaced apart in a second direction perpendicular to the first direction, and the flow guiding vanes being inclined relative to the first direction; The second direction is the radial direction of an imaginary circle centered on the center of the annular frame. A plurality of the guide vanes are arranged around the center of the annular frame, and the guide vanes extend obliquely from the inside to the outside along the first direction away from the center of the annular frame. The annular frame includes a first border, a second border, a third border, and a fourth border. The two ends of the first border are respectively connected to one end of the third border and one end of the fourth border, and the two ends of the second border are respectively connected to the other end of the third border and the fourth border. The guide vane includes a first guide portion, a second guide portion, a third guide portion, and a fourth guide portion. The two ends of the first guide portion along its length are respectively connected to one end of the third guide portion along its length and one end of the fourth guide portion along its length. The two ends of the second guide portion along its length are respectively connected to the other end of the third guide portion along its length and the other end of the fourth guide portion along its length. The width direction of each of the first guide portion, the second guide portion, the third guide portion, and the fourth guide portion is inclined relative to the first direction. The length direction of the first flow guide is parallel to the first frame, and the width direction of the first flow guide extends obliquely from the inside to the outside towards the first frame along the first direction. The length direction of the second flow guide is parallel to the second frame, and the width direction of the second flow guide extends obliquely from the inside to the outside along the first direction towards the direction close to the second frame. The length direction of the third guide portion is parallel to the third frame, and the width direction of the third guide portion extends obliquely from the inside to the outside along the first direction towards the direction close to the third frame. The length direction of the fourth flow guide is parallel to the fourth frame, and the width direction of the fourth flow guide extends obliquely from the inside to the outside along the first direction toward the direction close to the fourth frame. The second direction extends in the vertical direction, and the guide vane extends downward from the inside to the outside in the first direction.

2. The nozzle structure of the climate wind tunnel according to claim 1, characterized in that, The number of guide vanes is 6-10.

3. The nozzle structure of the climate wind tunnel according to claim 1, characterized in that, The angle between the width direction of the guide vane and the first direction is 30°-60°.

4. The nozzle structure of the climate wind tunnel according to claim 1, characterized in that, The guide plate includes a fifth guide section and a sixth guide section arranged in a third direction, the third direction being perpendicular to the first direction and the second direction, and one end of the fifth guide section in the length direction being connected to one end of the sixth guide section in the length direction; The fifth and sixth flow guides extend downward in the length direction along the direction close to each other, and the width direction of each of the fifth and sixth flow guides extends downward in the first direction from the inside to the outside.

5. The nozzle structure of the climate wind tunnel according to claim 4, characterized in that, The fifth and sixth flow guides are symmetrically arranged on the center line extending vertically along the annular frame, and the other end of the fifth flow guide and the other end of the sixth flow guide are connected to the annular frame.

6. The nozzle structure of the climate wind tunnel according to claim 4, characterized in that, The angle between the length direction of the fifth guide section and / or the sixth guide section and the horizontal plane is 30°-45°.

7. The nozzle structure of the climate wind tunnel according to claim 4, characterized in that, The angle between the extension direction of the intersection line of the fifth guide section and the sixth guide section and the horizontal plane is 30°-60°.

8. The nozzle structure of the climate wind tunnel according to claim 1, characterized in that, The number of guide vanes is 15-20.

9. The nozzle structure of the climate wind tunnel according to any one of claims 1-8, characterized in that, Also includes: A connector is fixedly connected to the annular frame, and the flow guiding component is fixedly mounted on the annular frame through the connector.

10. The nozzle structure of the climate wind tunnel according to any one of claims 1-8, characterized in that, The lower two ends of the annular frame are provided with fixed bases, and the nozzle structure is adapted to be detachably installed at the air outlet of the climate wind tunnel via the fixed bases.

11. A climate wind tunnel, characterized in that, The invention includes a spraying device and a nozzle structure for a climate wind tunnel according to any one of claims 1-10, wherein the spraying device is used to spray atomized droplets onto the nozzle structure.

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