阅读说明：本技术 一种可伸缩的涡流发生器及其运行方法 (telescopic vortex generator and operation method thereof ) 是由 丁勇钢 赵凯轩 于 2019-08-28 设计创作，主要内容包括：本发明涉及一种可伸缩的涡流发生器,包括：壳体,其具有可容纳翅片底座的空间,其中在所述壳体上设置有多个缺口,使得翅片能够从所述缺口中伸出和缩回；翅片底座,其被配置为能够在壳体的空间中相对于壳体移动,使得翅片从所述缺口中伸出和缩回；以及多个翅片,其以可折叠的方式布置在翅片底座上。此外,本发明还涉及一种用于运行涡流发生器的方法。通过本发明,可以实现涡流发生器的灵活的调节,其该涡流发生器的构造和安装成本较低,且无需在机体表面钻孔。(the invention relates to a scalable vortex generator comprising: a housing having a space in which a fin base is accommodated, wherein a plurality of notches are provided on the housing such that a fin can be extended and retracted from the notches; a fin mount configured to be movable relative to the housing in a space of the housing such that the fin extends and retracts from the notch; and a plurality of fins foldably arranged on the fin base. The invention further relates to a method for operating a vortex generator. The vortex generator can be flexibly adjusted, has low construction and installation cost and does not need to be drilled on the surface of the machine body.)

1. A scalable vortex generator comprising:

A housing having a space in which a fin base is accommodated, wherein a plurality of notches are provided on the housing such that a fin can be extended and retracted from the notches;

a fin mount configured to be movable relative to the housing in a space of the housing such that the fin extends and retracts from the notch; and

A plurality of fins foldably arranged on the fin base.

2. The vortex generator of claim 1, wherein the housing is an elongated envelope and the fin base is an elongated sheet receivable by the envelope in a form fit therewith.

3. The vortex generator of claim 1, wherein the notch of the housing is a notch having a length and width slightly greater than a width and thickness, respectively, of the fin.

4. The vortex generator of claim 1, wherein the fin is hingedly connected to the fin base.

5. The vortex generator of claim 1, wherein an adhesive portion is provided on a back side of the housing, the adhesive portion configured to be capable of adhering with the body.

6. The vortex generator of claim 1, further comprising a motor configured to push and pull the fin base to effect relative movement between the fin base and the housing.

7. Method for operating a vortex generator according to one of claims 1 to 6, comprising the following steps:

Pushing the fin base into the housing when no flow separation occurs or when the surface of the vortex generator is clean, such that the fins retract; and

When flow separation occurs or when the surface of the vortex generator is dirty, the fin base is pulled out of the housing, so that the fins protrude and stick up.

8. The method of claim 7, further comprising the step of:

The length of the fins extending out of the shell is adjusted by adjusting the length of the fin base in the shell.

9. an aircraft with a vortex generator according to one of claims 1 to 6.

10. Wind generator with a vortex generator according to one of claims 1 to 6.

Technical Field

The present invention relates generally to the field of aerodynamics, and more particularly to a scalable vortex generator. The invention further relates to a method for operating such a vortex generator.

Background

The vortex generator is widely applied to the fields of aviation, wind power generation, high tower building flow vibration suppression, marine ship resistance reduction and the like, and has the function of eliminating or reducing airflow separation. When an aircraft or a wind turbine or the like is operating, if an unfavorable separation of the air flow occurs at the surface of the body, many adverse consequences may occur, such as increased drag, reduced lift, leading to premature and asymmetric stalls, etc. For this purpose, vortex generators are provided at the airframe, so that in operation of the aircraft or fan, a pressure difference generated at the vortex generators will create a vortex-like airflow, which will guide the airflow smoothly along the airframe surface, thereby preventing airflow separation.

Current vortex generators fall into two categories: one is the fixed mount type, which is limited in that it is not automatically adjustable to actual flow conditions and is prone to fouling; another type is the non-stationary type, which has the limitation that the mechanical structure is very complicated, the cost is high, and the surface of the body needs to be drilled, which reduces the safe life of the components.

Disclosure of Invention

The object of the invention is to provide a scalable vortex generator and a method for operating such a vortex generator, by means of which a flexible adjustment of the vortex generator can be achieved, which is inexpensive to construct and install and does not require drilling on the surface of the body.

In a first aspect of the invention, this task is solved by a scalable vortex generator comprising:

A housing having a space in which a fin base is accommodated, wherein a plurality of notches are provided on the housing such that a fin can be extended and retracted from the notches;

a fin mount configured to be movable relative to the housing in a space of the housing such that the fin extends and retracts from the notch; and

A plurality of fins foldably arranged on the fin base.

in one embodiment of the invention, it is provided that the housing is an elongated envelope and the fin base is an elongated sheet which can be received by the envelope in a form-fitting manner. The space of the envelope must be sized to accommodate the thickness of the fin base plus the thickness of the fin.

In a further embodiment of the invention, it is provided that the recess of the housing is a notch, the length and width of which are slightly greater than the width and thickness of the fin, respectively. By providing the notches, the fins can be effectively extended and retracted.

In a preferred embodiment of the invention, the fin is connected to the fin base by a hinge. Other connections are also contemplated under the teachings of the present invention, as long as the connection allows the fins to rotate in a direction perpendicular to the fin surface. In order to maintain the erected state of the fins, the fins may be connected to the fin base by springs and rotational connections (e.g., hinges, spindles, universal joints, ball joints, etc.), so that a certain external force needs to be applied at the surface of the fins to retract the fins, which means that additional pushing force needs to be applied when pushing the fin base into the housing.

In another preferred embodiment of the present invention, it is provided that an adhesive portion is provided on the back surface of the case, and the adhesive portion is arranged to be capable of adhering to the machine body. The bonding portion may or may not have an adhesive. The adhesive is, for example, a structural adhesive.

In a further preferred aspect of the invention, it is provided that the vortex generator further comprises a motor configured to push and pull the fin base to effect relative movement between the fin base and the housing. The motor is for example a stepper motor. For example, the extension, retraction, and adjustment of the fin extension length may be achieved automatically by a motor. For example, the fin base can be driven by a motor to adjust the length of the fins extending out of the housing by adjusting the length of the fin base in the housing.

In a second aspect of the invention, the aforementioned object is achieved by a method for operating a vortex generator according to the invention, comprising the following steps:

pushing the fin base into the housing when no flow separation occurs or when the surface of the vortex generator is clean, such that the fins retract; and

When flow separation occurs or when the surface of the vortex generator is dirty, the fin base is pulled out of the housing, so that the fins protrude and stick up.

In a preferred embodiment of the invention, it is provided that the method further comprises the steps of:

the length of the fins extending out of the shell is adjusted by adjusting the length of the fin base in the shell.

with this preferred arrangement, the projecting length of the fins can be easily adjusted, thereby being adaptable to various fluid separation situations. For this purpose, a corresponding clearance can be provided between the housing and the fin base for accommodating the inclined fin portion. Furthermore, the adjustment can be carried out automatically by means of an electric motor. It should be noted that in other embodiments, the adjustment may also be accomplished manually, or by means of a simple mechanical structure or device.

The invention further relates to an aircraft having a vortex generator according to the invention.

In addition, the invention also provides a wind driven generator which is provided with the vortex generator.

The invention has at least the following beneficial effects: the fins are arranged on the fin base which can move relative to the shell, and the notches are arranged on the shell, so that the fins can be conveniently extended out of and retracted back from the shell, the extending length of the fins can be flexibly adjusted, and the device can be suitable for various operating occasions; furthermore, the vortex generator of the present invention is easy to install, does not require complex mechanical parts, is inexpensive, is made of plastic or other inexpensive composite materials, and is simple to drive, requiring only a simple, small driving force.

Drawings

The invention is further elucidated with reference to the drawings in conjunction with the detailed description.

Figure 1 shows a schematic view of a vortex generator according to the present invention; and

Fig. 2 shows a schematic view of different states of use of the vortex generator according to the invention.

Detailed Description

It should be noted that the components in the figures may be exaggerated and not necessarily to scale for illustrative purposes. In the figures, identical or functionally identical components are provided with the same reference symbols.

In the present invention, "disposed on …", "disposed over …" and "disposed over …" do not exclude the presence of an intermediate therebetween, unless otherwise specified. Further, "disposed on or above …" merely indicates the relative positional relationship between two components, and may also be converted to "disposed below or below …" and vice versa in certain cases, such as after reversing the product direction.

In the present invention, the embodiments are only intended to illustrate the aspects of the present invention, and should not be construed as limiting.

In the present invention, the terms "a" and "an" do not exclude the presence of a plurality of elements, unless otherwise specified.

it is further noted herein that in embodiments of the present invention, only a portion of the components or assemblies may be shown for clarity and simplicity, but those of ordinary skill in the art will appreciate that, given the teachings of the present invention, required components or assemblies may be added as needed in a particular scenario.

It is also noted herein that, within the scope of the present invention, the terms "same", "equal", and the like do not mean that the two values are absolutely equal, but allow some reasonable error, that is, the terms also encompass "substantially the same", "substantially equal". By analogy, in the present invention, the terms "perpendicular", "parallel" and the like in the directions of the tables also cover the meanings of "substantially perpendicular", "substantially parallel".

The numbering of the steps of the methods of the present invention does not limit the order of execution of the steps of the methods. Unless specifically stated, the method steps may be performed in a different order.

Vortex Generators (VGs) are typically used to increase the lift and lift-to-drag ratio of components to improve aerodynamic performance, or to break up large vortices at low frequencies to reduce component vibration. On the other hand, VGs also cause an increase in the resistance, which leads to an inversely reduced aerodynamic performance of the component in the clean state. The vortex generator with the telescopic and adjustable fin extending length can flexibly extend and retract the fins and adjust the extending length of the fins according to the surface condition of the vortex generator and the air flow separation, so that the vortex generator is suitable for various working conditions.

the invention is further elucidated with reference to the drawings in conjunction with the detailed description.

Fig. 1 shows a schematic view of a vortex generator 100 according to the present invention.

As shown in fig. 1, a scalable vortex generator 100 according to the present invention includes the following components (some of which are optional):

a housing 101 having a space for accommodating a fin base, wherein a plurality of notches 102 are provided on the housing 101 so that the fins 104 can be extended and retracted from the notches 102. The housing is here, for example, an elongate envelope, and the fin base is an elongate sheet which can be received by the envelope in a form-fitting manner. The space of the envelope is preferably sized to accommodate at least the thickness of the fin base 103 plus the thickness of the fins 104. Here, the indentations 102 of the housing 101 are notches, the length and width of which are preferably slightly larger than the width and thickness, respectively, of the fins 104. By providing the notches, the fins can be effectively extended and retracted. An adhesive portion (not shown) configured to be capable of adhering to an airframe (such as an airframe of an aircraft or a blower) may be optionally provided on the rear surface of the housing 101. The bonding portion may or may not have an adhesive. The adhesive is, for example, a structural adhesive.

A fin base 103, the fin base 103 being configured to be movable relative to the housing 101 in the space of the housing 101 such that the fin 103 extends and retracts from the notch 102. For example, in order to facilitate the relative movement, a slide rail may be provided in the fin base 103, and a slide groove that fits with the slide rail may be provided in the housing 101.

A plurality of fins 104 arranged in a foldable manner on the fin base 103. For example, the fins 104 and the fin base 103 may be connected by hinges. Other connections are also contemplated (e.g., hinges, spindles, gimbals, ball joints, etc.) under the teachings of the present invention, so long as the connection allows the fins to rotate in a direction perpendicular to the fin surfaces. In order to maintain the erect state of the fins, the fins may preferably be connected to the fin base by means of springs and rotational connections (e.g. hinges, spindles, gimbals, ball joints, etc.) so that a certain external force needs to be applied at the surface of the fins to retract the fins, which is manifested in that an additional pushing force needs to be applied when pushing the fin base into the housing.

a motor (not shown) configured to push and pull the fin base 103 to effect relative movement between the fin base 103 and the housing 101. The motor is for example a stepper motor or a servo motor. For example, the extension, retraction, and adjustment of the fin extension length of the fins 104 may be achieved automatically by a motor. For example, the fin base may be moved by a motor to adjust the length of the fins extending out of the housing by adjusting the length of the fin base 103 in the housing 101.

Fig. 2 shows a schematic view of different states of use of the vortex generator according to the invention.

The upper part of fig. 2 shows a first state of the vortex generator, in which the fins are retracted, and the lower part shows a second state of the vortex generator, in which the fins are extended.

When no flow separation occurs or when the surface of the vortex generator is clean, the fin base 103 is pushed into the housing 101 so that the fins retract, with the vortex generator in the first state.

When flow separation occurs or when the surface of the vortex generator is dirty, the fin base 103 is pulled out of the housing 101, so that the fins protrude and stand up, with the vortex generator in the second state.

In addition, the length of the fins 104 extending out of the housing 101 can also be adjusted by adjusting the length of the fin base 103 in the housing 101.

the extension and retraction of the fins and the length adjustment may be performed by a motor, for example.

The invention has at least the following beneficial effects: the fins are arranged on the fin base which can move relative to the shell, and the notches are arranged on the shell, so that the fins can be conveniently extended out of and retracted back from the shell, the extending length of the fins can be flexibly adjusted, and the device can be suitable for various operating occasions; furthermore, the vortex generator of the present invention is easy to install, does not require complex mechanical parts, is inexpensive, is made of plastic or other inexpensive composite materials, and is simple to drive, requiring only a simple, small driving force.

Although some embodiments of the present invention have been described herein, those skilled in the art will appreciate that they have been presented by way of example only. Numerous variations, substitutions and modifications will occur to those skilled in the art in light of the teachings of the present invention without departing from the scope thereof. It is intended that the following claims define the scope of the invention and that methods and structures within the scope of these claims and their equivalents be covered thereby.