Pipeline with airflow direction control structure
By setting up an interlaced flow guide structure in the aero engine pipeline, the problem of controlling the secondary flow airflow direction in the prior art requires additional parts, and the airflow flow direction control without additional parts is realized, which significantly improves the control effect of fluid flow direction.
Patent Information
- Application Number
- CN202421423399.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-06-20
AI Technical Summary
Controlling the secondary flow flow direction in existing aero engine pipelines requires additional components, such as a one-way valve, which increases costs and limits the operating life of the valve.
A pipeline with a structure that controls the flow direction of the air flow is designed, and the inner pipe wall is provided with at least two rows of staggered flow guide structures, and the flow guide structures are vertically distributed on the inner pipe wall surface and penetrate the pipe wall of the pipe. The staggered distance between the flow guide structures is half the length of the flow guide structure.
Through this structural design, the flow direction of the air flow can be effectively controlled without adding additional accessories, with almost no pressure loss during forward flow, and huge pressure loss during reverse flow, making it difficult for fluid to flow backward, which significantly improves the effect of fluid flow control.
Smart Images
Figure CN222894310U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of aviation engines, in particular to a pipeline with a structure for controlling the flow direction of airflow. Background Art
[0002] In the prior art, in order to control the flow direction of the secondary flow in the engine pipeline, additional components such as a check valve are usually used for control.
[0003] However, the addition of additional parts will lead to additional costs and limit the valve actuation life.
[0004] In view of this, the inventor of the present application designed a pipeline with a structure for controlling the flow direction of airflow in order to overcome the above technical problems. Utility Model Content
[0005] The technical problem to be solved by the utility model is to overcome the defects in the prior art that the engine pipeline controls the flow direction of the secondary flow, requires additional parts, increases additional costs, and limits the life span, and provides a pipeline with a structure for controlling the flow direction of the airflow.
[0006] The utility model solves the above technical problems through the following technical solutions:
[0007] A pipe with a structure for controlling airflow direction, characterized in that at least two rows of staggered flow guiding structures are arranged on the inner pipe wall surface of the pipe with the structure for controlling airflow direction, and the flow guiding structures are vertically distributed on the inner pipe wall surface and penetrate the pipe wall of the pipe;
[0008] The staggered distance between the flow guiding structures is half the length of the flow guiding structures.
[0009] According to an embodiment of the present utility model, the flow guiding structures have two rows.
[0010] According to an embodiment of the present utility model, the guide structure is a guide plate.
[0011] According to an embodiment of the utility model, the guide plate is in the shape of a water drop, a blade or a long strip.
[0012] According to an embodiment of the present invention, the guide structure gradually widens or narrows from the first end to the second end.
[0013] According to an embodiment of the present invention, the guide structures in each row are arranged in a horizontal direction and sequentially from the first end to the second end.
[0014] According to an embodiment of the present invention, two adjacent flow guide structures in each row are arranged at an interval from each other.
[0015] According to an embodiment of the present invention, the opposite sides of the guide plates in two adjacent rows are parallel to each other.
[0016] According to an embodiment of the utility model, the opposite sides between two adjacent rows of guide plates are arranged horizontally.
[0017] The positive and progressive effects of the utility model are:
[0018] The utility model has a pipeline with a structure for controlling the flow direction of airflow, which has the following advantages:
[0019] 1. The structure is simple and feasible, and no additional valves or other accessories are required.
[0020] 2. After simulation comparison, it is found that there is an obvious difference in the pressure loss of the secondary flows in different directions in the pipeline with the structure for controlling the flow direction of the airflow. It can be considered that there is almost no pressure loss in the forward flow, but the pressure loss is huge in the reverse flow, and it is difficult for the fluid to flow back.
[0021] 3. After simulation comparison, the pressure difference caused by the forward flow resistance under this structure is about 5%, and the pressure difference caused by the reverse flow resistance is about 85%. Therefore, the pipeline has an obvious and practical effect on controlling the flow direction of the fluid. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always represent the same features, wherein:
[0023] Figure 1 It is a structural schematic diagram of a pipeline with a structure for controlling airflow direction of the utility model.
[0024] Figure 2 It is a schematic diagram of the flow guiding structure in the pipeline with the structure for controlling the flow direction of the airflow according to the utility model.
[0025] Figure 3 It is a schematic diagram of the forward flow form in the pipeline with the structure for controlling the flow direction of the airflow according to the utility model.
[0026] Figure 4 It is a schematic diagram of the reverse flow form in the pipeline with a structure for controlling the flow direction of the airflow according to the utility model. DETAILED DESCRIPTION
[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.
[0028] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.Preferred embodiments of the present invention will now be described in detail, examples of which are shown in the accompanying drawings.Where possible, the same reference numerals will be used throughout the drawings to represent the same or similar parts.
[0029] In addition, although the terms used in the present invention are selected from well-known and commonly used terms, some terms mentioned in the specification of the present invention may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article.
[0030] Furthermore, it is required that the present invention be understood not only by the actual terms used but also by the meanings contained in each term.
[0031] Figure 1 It is a structural schematic diagram of a pipeline with a structure for controlling airflow direction of the utility model. Figure 2 It is a schematic diagram of the flow guiding structure in the pipeline with the structure for controlling the flow direction of the airflow according to the utility model. Figure 3 It is a schematic diagram of the forward flow form in the pipeline with the structure for controlling the flow direction of the airflow according to the utility model. Figure 4 It is a schematic diagram of the reverse flow form in the pipeline with a structure for controlling the flow direction of the airflow according to the utility model.
[0032] like Figures 1 to 4 As shown, the utility model discloses a pipe 10 with a structure for controlling airflow direction, wherein at least two rows of staggered flow guiding structures 20 are arranged on the inner pipe wall surface, and the flow guiding structures 20 are vertically distributed on the inner pipe wall surface 11 and penetrate the pipe wall of the pipe 10.
[0033] For example, in this embodiment, the guide structure has two rows as an example.
[0034] Preferably, the staggered distance between the flow guiding structures 20 is half the length of the flow guiding structures 20 .
[0035] In this embodiment, the guide structure 20 is preferably a guide plate.
[0036] Further preferably, the guide plate is in the shape of a teardrop, a blade or a long strip.
[0037] Furthermore, the guide structures 20 gradually become wider or narrower from the first end 21 to the second end 22. The guide structures 20 in each row are arranged in the horizontal direction and sequentially from the first end 21 to the second end 22.
[0038] Meanwhile, two adjacent flow guiding structures 20 in each row are arranged at an interval from each other.
[0039] The opposite sides of the guide plates in two adjacent rows are parallel to each other.
[0040] The opposite sides between two adjacent rows of guide plates are arranged horizontally.
[0041] According to the above structural description, the utility model has a pipe with a structure for controlling the direction of airflow. In the structural design, the guide-like structure is divided into two rows and arranged in a staggered manner, and the staggered distance is half the length of the guide plate.
[0042] The structure shape of the guide plate is as follows Figure 2 shown.
[0043] Forward flow and reverse flow Figure 3 It can be seen that the flow resistance is small during forward flow, and the streamline flows unidirectionally to the outlet. When the flow is reversed, there are a lot of vortices in the flow, and the branches along the guide structure will collide with the flow in the middle channel, increasing the flow resistance.
[0044] The distribution of its diversion-like structure is vertical and penetrates the pipe wall. Simulation results show that the structure has obvious flow direction controllability.
[0045] The utility model has a pipeline with a structure for controlling the flow direction of airflow, and uses the pressure loss characteristics of the fluid itself to control the flow direction of the secondary flow (ie, the airflow for cooling the aircraft engine) through its own structural characteristics without designing additional accessories.
[0046] In summary, the utility model has a pipeline with a structure for controlling the flow direction of airflow, which has the following advantages:
[0047] 1. The structure is simple and feasible, and no additional valves or other accessories are required.
[0048] 2. After simulation comparison, it is found that there is an obvious difference in the pressure loss of the secondary flows in different directions in the pipeline with the structure for controlling the flow direction of the airflow. It can be considered that there is almost no pressure loss in the forward flow, but the pressure loss is huge in the reverse flow, and it is difficult for the fluid to flow back.
[0049] 3. After simulation comparison, the pressure difference caused by the forward flow resistance under this structure is about 5%, and the pressure difference caused by the reverse flow resistance is about 85%. Therefore, the pipeline has an obvious and practical effect on controlling the flow direction of the fluid.
[0050] The utility model designs a simple drainage structure in the pipeline with a structure for controlling the flow direction of the airflow, improves the flow of the secondary flow during forward flow, reduces the occurrence of eddy currents, and increases the flow resistance during reverse flow, thereby achieving the purpose of controlling the flow direction.
[0051] For those skilled in the art, the above invention disclosure is only used as an example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary implementation of the present application.
[0052] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.
[0053] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus facilitate the understanding of one or more embodiments of the invention, in the foregoing description of the embodiments of this application, multiple features are sometimes grouped into one embodiment, drawing, or description thereof. However, this disclosure method does not mean that the subject matter of this application requires more features than those mentioned in the claims. In fact, the features of an embodiment are less than all the features of a single embodiment disclosed above.
[0054] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications fall within the protection scope of the present invention.
Claims
1. A pipe with a structure for controlling the direction of airflow, characterized in that: At least two rows of staggered flow-guiding structures are arranged on the inner tube wall of the pipeline with the airflow direction control structure, and the flow-guiding structures are vertically distributed on the inner tube wall and penetrate the tube wall of the pipeline; The staggered distance between the flow guiding structures is half the length of the flow guiding structures.
2. The pipeline with a structure for controlling airflow direction according to claim 1, characterized in that: The guide structure has two rows.
3. The pipeline with a structure for controlling airflow direction according to claim 1, characterized in that: The flow guide structure is a flow guide plate.
4. The pipeline with a structure for controlling airflow direction according to claim 3, characterized in that: The guide plate is in the shape of a water drop, a blade or a long strip.
5. The pipeline with a structure for controlling airflow direction according to claim 1, characterized in that: The flow guiding structure gradually widens or narrows from the first end to the second end.
6. The pipeline with a structure for controlling airflow direction according to claim 5, characterized in that: The guide structures in each row are arranged in a horizontal direction and sequentially from the first end to the second end.
7. The pipeline with a structure for controlling airflow direction according to claim 6, characterized in that: Two adjacent flow-guiding structures in each row are arranged at an interval from each other.
8. The pipeline with a structure for controlling airflow direction according to claim 3, characterized in that: The opposite sides of the guide plates in two adjacent rows are parallel to each other.
9. The pipeline with a structure for controlling airflow direction according to claim 3, characterized in that: The opposite sides between two adjacent rows of guide plates are arranged horizontally.