WO2021133198A1 - Tube aérodynamique de type fermé à recirculation - Google Patents

Tube aérodynamique de type fermé à recirculation Download PDF

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Publication number
WO2021133198A1
WO2021133198A1 PCT/RU2019/001029 RU2019001029W WO2021133198A1 WO 2021133198 A1 WO2021133198 A1 WO 2021133198A1 RU 2019001029 W RU2019001029 W RU 2019001029W WO 2021133198 A1 WO2021133198 A1 WO 2021133198A1
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WO
WIPO (PCT)
Prior art keywords
flight chamber
section
curved
wind tunnel
flight
Prior art date
Application number
PCT/RU2019/001029
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English (en)
Russian (ru)
Inventor
ПРЕДПРИНИМАТЕЛЬ ПЛЕТНЕВ Роман Александрович ИНДИВИДУАЛЬНЫЙ
Александр Владимирович ПЛЕТНЕВ
Шафигулла Набегулович ЮНУСОВ
Original Assignee
ПРЕДПРИНИМАТЕЛЬ ПЛЕТНЕВ Роман Александрович ИНДИВИДУАЛЬНЫЙ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ПРЕДПРИНИМАТЕЛЬ ПЛЕТНЕВ Роман Александрович ИНДИВИДУАЛЬНЫЙ filed Critical ПРЕДПРИНИМАТЕЛЬ ПЛЕТНЕВ Роман Александрович ИНДИВИДУАЛЬНЫЙ
Priority to PCT/RU2019/001029 priority Critical patent/WO2021133198A1/fr
Publication of WO2021133198A1 publication Critical patent/WO2021133198A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
    • G01M9/02—Wind tunnels

Definitions

  • the invention relates to a device for simulating sports exercises in an air flow, namely to wind tunnels of a closed recirculation type, which can be used for aerodynamic studies of the technique of performing exercises by a person (athlete, pilot) in various professional disciplines, including for sports tests and carrying out testing of professional equipment for athletes, pilots, parachutists.
  • Wind tunnels of the proposed type should form an air flow with the characteristics necessary for performing simulation exercises in the closest to natural real conditions.
  • the most important factor when choosing a wind tunnel design is the ability to most accurately simulate the air flow for aerodynamic research, including such basic characteristics as the required air flow speed, its uniformity - the absence of eddies, and the creation of the necessary real angles of attack of the air flow in relation to the pilot's flight configuration - athlete.
  • the disadvantage of the known wind tunnel is the complication of the design due to the use of flexible joints of the air ducts, which can lead to significant hydraulic losses in the joints when changing the angle of their installation relative to the horizontal axis, both during air flow and due to partial leakage of the joints.
  • Another analogue the closest in its technical essence to the proposed invention is the design of the device "Simulator of parachute jumps in a wind tunnel", described in the international publication WO2018 / 015766, containing a flight chamber with a section inclined and curved to a vertical plane, the shape of this curve has a smooth transition from approximately horizontal to approximately vertical, where the first part of the flight chamber can be set from 0 to 45 ° horizontally and the last part of the flight chamber from 45 to 90 ° horizontally, or a curved surface is curved in two or more dimensions, or the curvature of a curved surface is defined by a spline.
  • the disadvantages of the known device is the uncertainty of the formation of the air flow in the flight chamber. Moreover, for each specific sports discipline, for example, jumping from a WingSuit or jumping skiers from a springboard, its own flight path is required, due to the presence of specific angles of attack of the athlete's configuration in relation to the moving air flow in the working area of the wind tunnel.
  • the present invention is aimed at overcoming the above-mentioned disadvantages of the prior art and allows to solve the technical problem consisting in the most complete and accurate modeling of the air flow in relation to a specific flight configuration of a pilot-athlete.
  • a closed recirculation type wind tunnel comprising: a fan assembly, a confuser, a flight chamber, a diffuser, a return air duct and a plurality of rotary air ducts that combine the elements of the wind tunnel into a single system, while the flight chamber is made with at least one curved section, which is made with the profile of a curved trajectory described by the section of the Cornu spiral.
  • the present invention provides the most complete simulation of various flight configuration modes for athletes who use free hovering of a person in the air, for example, parachutists, as well as gliding, gliding along an air stream, for example, WingSuit or ski jumping skiers, in their performances, thus, so that a similar profile of the curve ensures the uniformity of the air flow in its cross section and their stable sliding in the airspace in all three-dimensional planes, both in the positive and negative directions of movement of the coordinate axes, as well as stable sliding at a positive or negative angle of attack of the pilot configuration relative to the moving air stream.
  • the technical result is achieved due to the fact that in a wind tunnel for imitation exercises of a person in an air stream, containing a flight chamber with at least one curved section, which is made with a profile of a curved trajectory described by a section of the Cornu spiral (which is also known as a clothoid or Euler spiral , i.e. a curve whose curvature changes linearly as a function of the arc length).
  • a section of the Cornu spiral which is also known as a clothoid or Euler spiral , i.e. a curve whose curvature changes linearly as a function of the arc length.
  • a wind tunnel is proposed in which at least one curved section of the flight chamber is formed with a curved trajectory profile described by a section of the negative branch of the Cornu spiral.
  • a wind tunnel is provided in which at least one curved section of the flight chamber is formed with the profile of a curvilinear trajectory described by a section of the positive branch of the Cornu spiral.
  • a wind tunnel in which the flight chamber is made with two curved sections, the first curved section is made with the profile of a curved trajectory described by the section of the negative branch of the Cornu spiral, and the second curved section is made with the profile of the curved trajectory described by the section of the positive branch of the spiral Cornu.
  • a wind tunnel is provided, in which: an entry-exit assembly is provided in the upper part of at least one curved section of a flight chamber, and / or an entry-exit assembly is provided in the lower part of at least one curved section of a flight chamber.
  • a wind tunnel in which the flight chamber is made with two curved sections, and the entry-exit assembly located at the top of the first curved section and the entry-exit assembly of the second curved section are a single unit.
  • a wind tunnel is provided in which a vertical section of a flight chamber is provided.
  • a wind tunnel is provided with an entry / exit assembly at the bottom of a vertical section of a flight chamber.
  • a wind tunnel is provided in which a vertical section of a flight chamber is located above at least one of the curved sections of the flight chamber.
  • a wind tunnel is provided in which a safety net is provided below the vertical section of the flight chamber but above at least one of the curved sections of the flight chamber.
  • a wind tunnel in which the vertical section of the flight chamber is located above the curved section of the flight chamber, made with the profile of the curved trajectory described by the section of the positive branch of the Cornu spiral, while in the upper part of the curved section of the flight chamber, an entry-exit unit is provided for access to both the curved section of the flight chamber and the vertical section of the flight chamber.
  • a wind tunnel is provided in which a vertical section of a flight chamber is located below at least one of the curved sections of the flight chamber.
  • a wind tunnel is provided in which a safety net is provided above the vertical section of the flight chamber but below at least one of the curved sections of the flight chamber.
  • a wind tunnel is provided in which a safety net is provided below the flight chamber, preferably such a safety net is located between the confuser and the flight chamber.
  • a wind tunnel in which a monorail is mounted along the profile of the curved path of at least one curved section, along which a suspension trolley moves, adapted to hold the athlete.
  • a wind tunnel is provided with an inlet / outlet assembly at the top of the diffuser.
  • Figure 1 shows the Cornu spiral, the sections of which describe the trajectory of the profile of the curved section of the flight chamber.
  • Figure 2 shows an embodiment of a wind tunnel according to the present invention, comprising a curved section of a flight chamber with a profile of a curved trajectory described by a section of the negative branch of the Cornu spiral.
  • Fig. 3 shows an embodiment of a wind tunnel according to the present invention, comprising a curved section of a flight chamber with a profile a curvilinear trajectory described by a section of the positive branch of the Cornu spiral.
  • Figure 4 shows another embodiment of a wind tunnel according to the present invention, comprising a curved section of a flight chamber with a curved trajectory profile described by a positive branch section of the Cornu spiral.
  • Figure 5 shows another embodiment of a wind tunnel according to the present invention, comprising a curved section of a flight chamber with a curved trajectory profile described by a section of the negative branch of the Cornu spiral.
  • Figure 6 shows another embodiment of the wind tunnel according to the present invention, containing two curved sections, one of which is made with a profile of a curved trajectory described by a section of the negative branch of the Cornu spiral, and the other is made with a profile of a curved trajectory described by a section of the positive branch of the Cornu spiral ...
  • the present invention relates to a device for simulating sports exercises in an air flow, namely, wind tunnels of a closed recirculation type, which can be used for aerodynamic studies of techniques for performing exercises by a person (athlete, pilot) in various professional disciplines, including sports tests and testing of professional equipment for athletes, pilots, parachutists.
  • a closed recirculation wind tunnel comprising: a fan assembly 1, a confuser 4, a flight chamber 5, a diffuser 10, a return air duct 19, and a plurality of rotary air ducts 2 that integrate wind tunnel elements into a single system.
  • the flight chamber 5 is made with at least one curved section 7, 8, which is made with a profile 6 of a curved trajectory described by the section of the Cornu spiral.
  • FIG. 1 shows the Cornu spiral, which is described by the following system of equations. for s coli (-oo; 0) for s réelle (0; + oo) for SE (- oo; 0) for se (0; + oo)
  • the curve determined for s ⁇ 0 is considered to be a negative (or left or lower) branch of the Cornu spiral, and the curve determined for s> 0 is considered to be a positive (or right or upper) branch of the Cornu spiral.
  • FIG. 1 shows the value of the parameter and at different points of the curve.
  • parameters a and b that is, on the dimensions of the curve to the left and right.
  • the values of parameters a and b are equal.
  • the location for cutting the spiral can be selected depending on the required angle of inclination of the tangent to the abscissa axis.
  • the curve can be cut off anywhere, limiting the range of variation of the parameter s.
  • the scaling of an inclined curved duct formed by the Cornu spiral can be performed in any arbitrary parameters, while the uniformity of the air flow is maintained in any cross-section of the duct.
  • below is the calculation of the curved section 7 of the flight chamber, which is made with the profile of the curved trajectory described by the section of the negative branch of the Cornu spiral.
  • the coordinates of the parameters x and y are given in Table 1 below for different values of the parameter b.
  • the overall dimensions of the calculated curved section 7 of the flight chamber in the most preferred embodiment are about 4 m in height and about 7 m in width. Accordingly, to reduce the overall dimensions, the parameter b should be reduced. And vice versa, to increase the overall dimensions, the parameter b should be increased.
  • the coordinates of the parameters x and y are given in Table 2 below for various values of the parameter a.
  • a wind tunnel is proposed, in which at least one curved section 7 of the flight chamber is formed with a curved path profile described by a section of the negative branch of the Cornu spiral.
  • Such an embodiment of the wind tunnel is preferred for training ski jumpers.
  • a wind tunnel is proposed, in which at least one curved section 8 of the flight chamber is formed with a curved path profile described by a section of the positive branch of the Cornu spiral.
  • the wind tunnel is preferred for training WingSuit jumpers.
  • a wind tunnel is proposed, in which the flight chamber is made with two curved sections, and the first curved section 7 is made with the profile of a curved trajectory described by the section of the negative branch of the Cornu spiral, and the second curved section 8 is made with the profile of the curved trajectory described by the section positive branch of the Cornu spiral. Accordingly, such a wind tunnel embodiment is preferred for training both Ski Jumpers and WingSuit Jumpers.
  • rotary air ducts 2 can be elements that provide a change in the air flow inside the wind tunnel by 90 °, 180 °, 270 ° or any other angle necessary to provide a uniform path of air flow inside the wind tunnel. All such rotary ducts will be designated by reference numeral 2.
  • the duct 91 is not essentially a return duct 19 for directing the airflow from the flight chamber 5 to the fan assembly 1, but an air duct through which the air flow is directed from the fan assembly 1 to the curved flight chamber.
  • their design is essentially the same and is generally a cylindrical tube or a tube with a rectangular cross section.
  • a wind tunnel is provided in which a safety net 18 is provided below the flight chamber, preferably such a safety net is located directly between the confuser 4 and the lower section of the flight chamber.
  • a safety net 18 also contributes to the alignment of the air velocity field.
  • the air flow rate inside the flight chamber can be adjusted automatically, or at the command of the operator using a control system (not shown) containing frequency converters for variable electric motors (not shown) of the fan assembly.
  • the movement of the air flow in the flight chamber occurs along a curved trajectory, the profile 6 of which is formed by the Cornu spiral.
  • the generatrix of the lower left branch in negative coordinates (-x; -y) forms a section 7 of the flight chamber, which can be used, for example, for imitation exercises of ski jumpers.
  • the generatrix of the upper right branch in positive coordinates (+ x; + y) forms a section 8 of the flight chamber, which in turn is used, for example, for imitation exercises of WingSuit jumpers.
  • an athlete or a pilot can enter the flight chamber through several apertures that can be provided in the proposed wind tunnel.
  • the specified door-openings or entry-exit nodes can also be used to exit the flight chamber.
  • Such entry-exit assemblies can be made similar to revolving doors, which are essentially disclosed in RF patent for invention N ° 2693106 and / or RF patent for invention N2 2692744, which were mentioned above.
  • a wind tunnel is proposed, in which an inlet-outlet assembly 13, 15 is provided in the upper part of at least one curved section of the flight chamber, and / or an inlet-outlet assembly 15, 17 is provided in the lower part of at least one curved section of the flight camera.
  • a wind tunnel is provided in which the flight chamber is formed with two curved sections 7, 8, as shown in FIG. 6, wherein the entry / exit assembly 15 located at the top of the first curved section 7 and the entry / exit assembly 15 of the second curved section 8 are essentially a single assembly.
  • the entry-exit unit 13 is used to enter the flight chamber on a curved section 8 of positive curvature, i.e. on the section, which is made with the profile of a curved trajectory described by the section of the positive branch of the Cornu spiral, for exercise by WingSuit jumpers.
  • the entry-exit unit 15 is used to exit the flight chamber on a curved section 8 of positive curvature and to enter the flight chamber on a curved section 7 of negative curvature, i.e. on the section, which is made with the profile of a curved trajectory described by the section of the negative branch of the Cornu spiral, where exercises can be performed by ski jumpers and horizontal flight exercises at low angles of attack.
  • Node 17 entry-exit is used to exit the flight chamber on a curved section 7 of negative curvature, where exercises can be performed by ski jumpers and horizontal flight exercises at high angles of attack.
  • an inclined curved wind tunnel can be made with a flight chamber containing only a curved section 7 of negative curvature, as shown in FIG. 2.
  • the direction of the air flow 21 in relation to the jumping skier 20 can make an angle 22 of attack of about 10 °, and during further flight until the landing, the angle of attack 23 can increase to 40 °.
  • the inclined curved wind tunnel can be configured with a flight chamber containing only a curved portion 8 of positive curvature, as shown in FIG. 3.
  • a wind tunnel can be primarily intended for training WingSuit athletes.
  • the angle of attack 24 at the beginning of the flight of the pilot 25 can take on both positive and negative values, and at the end of the flight, when braking to open the parachute, the angle of attack 26 can take on significant positive values.
  • a wind tunnel can be provided, in which a vertical section 11 of the flight chamber is also provided.
  • the vertical section 11 of the flight chamber is used for free hovering exercises for parachutists.
  • an inlet-outlet assembly 12 may be provided in the wind tunnel at the bottom of the vertical section 11 of the flight chamber.
  • a wind tunnel is proposed in which the vertical section 11 of the flight chamber is located above at least one of the curved sections 7, 8 of the flight chamber.
  • the vertical section 11 is located above the curved section 8 of positive curvature, since in this case, it is not necessary to use additional rotary ducts to redirect the air flow.
  • the implementation of the proposed wind tunnel in which below the vertical section 11 of the flight chamber, but above at least one of the curved sections 7, 8 of the flight chamber, a safety net 18 is provided.
  • the safety net 18 can be configured to be inserted and retracted into place of its installation.
  • the safety net 18 can be used when the vertical section 11 of the flight chamber is carried out less experienced athletes workout. On the contrary, if more experienced athletes are training in a wind tunnel, the safety net can be removed, while providing the opportunity to perform combined training, both with soaring in the vertical section 11 of the flight chamber, and with flying in the curved sections located below.
  • a wind tunnel in which the vertical section 11 of the flight chamber is located above the curved section 8 of the flight chamber, made with the profile of a curved trajectory described by a section of the positive branch of the Cornu spiral, while in the upper part of the curved section 8 the flight chamber is provided with an entry-exit unit 12 for accessing both the curved section 8 of the flight chamber and the vertical section 11 of the flight chamber (see, for example, FIG. 4).
  • a wind tunnel can be provided in which the vertical section 11 of the flight chamber is located below at least one of the curved sections 7, 8 of the flight chamber.
  • the vertical section 11 of the flight chamber is located below the curved section 7 of negative curvature, since in this case, it is not necessary to use additional rotary ducts to redirect the air flow.
  • a safety net 18 is provided, which increases the safety of jumping and flying in the above curved sections 7, 8 of the flight chamber. It will be appreciated that such a safety net 18 may be retractable to allow combined jumps and flights.
  • an inlet-outlet assembly 9 may be provided in the upper part of the diffuser 10, in which case it is possible to perform base jumping exercises for parachutists.
  • a wind tunnel in which a monorail 29 is mounted along the profile 6 of the curved trajectory of at least one curved section 7, 8, along which a suspension trolley 28 moves, adapted to hold the athlete.
  • a cable suspension 27 can be used, which is attached at one end to the suspension trolley 28, and at the other end holds the athlete.
  • a flight chamber with at least one curved section is provided in a wind tunnel for simulating human exercises in an air flow, which is made with a curved path profile described by a section of the Cornu spiral.
  • This ensures the continuity of the curvature function with the minimum possible for a given length, the rate of change of curvature and, accordingly, with the minimum rate of increase of the centrifugal force at a constant speed along the generatrix of the air flow curve.
  • the minimum increase in centrifugal force determines the uniformity of the air flow in the curved flight chamber and a decrease in hydraulic losses.
  • the present invention guarantees the most complete imitation of various modes of flight configurations for athletes who use in their performances free soaring of a person in the air, for example, parachutists, as well as gliding, gliding along the air stream, for example, WingSuit or ski jumping skiers. , in such a way that such a profile of the curve ensures the uniformity of the air flow in its cross section and their stable sliding in the air space in all three-dimensional planes, both in the positive and negative directions of the movement of the axes coordinates, as well as stable sliding at a positive or negative angle of attack of the pilot's configuration relative to the moving air stream.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)

Abstract

L'invention concerne un dispositif pour reproduire des exercices de sport dans un flux d'air, et notamment des tubes aérodynamiques de type fermé à recirculation qui peuvent être utilisés pour des recherches aérodynamiques dans les techniques d'exécution par une personne (sportifs, pilotes) d'exercices dans différentes disciplines professionnelles, y compris des essais sportifs et pour effectuer des tests d'équipements professionnels pour des sportifs, des pilotes et des parachutistes. Dans un mode de réalisation proposé, l'invention concerne un tube aérodynamique de type fermé à recirculation comprenant: une unité de ventilateur (1), un concentrateur (4), une chambre de vol (5), un diffuseur (10), un conduit d'air de retour (19) et une pluralité de conduits d'air orientables (2) reliant les éléments du tube aérodynamique en un système unifié; la chambre de vol (5) comprend au moins une section curviligne (7, 8) qui possède un profil (6) de trajectoire curviligne décrivant une section de spirale de Cornu.
PCT/RU2019/001029 2019-12-26 2019-12-26 Tube aérodynamique de type fermé à recirculation WO2021133198A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/RU2019/001029 WO2021133198A1 (fr) 2019-12-26 2019-12-26 Tube aérodynamique de type fermé à recirculation

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Application Number Priority Date Filing Date Title
PCT/RU2019/001029 WO2021133198A1 (fr) 2019-12-26 2019-12-26 Tube aérodynamique de type fermé à recirculation

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113252288A (zh) * 2021-07-19 2021-08-13 中国空气动力研究与发展中心高速空气动力研究所 一种基于喷流和舵面的俯仰角闭环控制的风洞试验方法
WO2022071786A1 (fr) * 2020-09-30 2022-04-07 Storm Adventures, Sia Tunnel aérodynamique horizontal

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006012647A2 (fr) * 2004-07-30 2006-02-02 Skyventure, Llc Simulateur de parachutisme sportif a soufflerie verticale de recirculation et cable de halage reduit utilise dans les souffleries verticales et autres emplacements
RU2377525C2 (ru) * 2005-05-30 2009-12-27 Виктор Борисович Петрук Аэродинамическая труба
WO2017142461A1 (fr) * 2016-02-15 2017-08-24 Inclined Labs AB Tunnel aérodynamique pour vol humain
RU2692744C1 (ru) * 2018-09-28 2019-06-26 Роман Александрович Плетнев Вертикальная аэродинамическая труба замкнутого рециркуляционного типа для воспроизведения свободного парения человека в воздухе
RU2693106C1 (ru) * 2018-09-28 2019-07-01 Роман Александрович Плетнев Вертикальная аэродинамическая труба для воспроизведения свободного парения человека в воздухе

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006012647A2 (fr) * 2004-07-30 2006-02-02 Skyventure, Llc Simulateur de parachutisme sportif a soufflerie verticale de recirculation et cable de halage reduit utilise dans les souffleries verticales et autres emplacements
RU2377525C2 (ru) * 2005-05-30 2009-12-27 Виктор Борисович Петрук Аэродинамическая труба
WO2017142461A1 (fr) * 2016-02-15 2017-08-24 Inclined Labs AB Tunnel aérodynamique pour vol humain
RU2692744C1 (ru) * 2018-09-28 2019-06-26 Роман Александрович Плетнев Вертикальная аэродинамическая труба замкнутого рециркуляционного типа для воспроизведения свободного парения человека в воздухе
RU2693106C1 (ru) * 2018-09-28 2019-07-01 Роман Александрович Плетнев Вертикальная аэродинамическая труба для воспроизведения свободного парения человека в воздухе

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022071786A1 (fr) * 2020-09-30 2022-04-07 Storm Adventures, Sia Tunnel aérodynamique horizontal
CN113252288A (zh) * 2021-07-19 2021-08-13 中国空气动力研究与发展中心高速空气动力研究所 一种基于喷流和舵面的俯仰角闭环控制的风洞试验方法

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