PL227429B1 - Low-placed rotor wind turbine with vertical rotation of rotor axis and ring-palisade casing - Google Patents

Abstract

The turbine consists of a palisade-ring housing, which is formed by: an upper ring (1), at least one basic ring (2), a pre-rotor ring (3) and a post-rotor ring (4), located coaxially with respect to the axis of rotation (17) of the rotor (5) in horizontal planes one below the other, having cross-sections in the shape of a concave-convex airfoil, with a rounded leading edge of finite radius and a sharply ended trailing edge in the lower part of the rings; three vertical supports (7), attached to the ground (11), spaced every 120 degrees, the upper sections of which are connected to the rings of the housing; a rotor (5) located in the lower part of the housing, attached to the vertical supports (7) by means of horizontal connectors (8); and an electrical energy generating device (6) driven by the rotor (5). The pre-rotor (3) and post-rotor (4) rings form a specific system of a slotted convergent-divergent channel surrounding the rotor (5), in which its convergent portion is formed by the inner surface of the pre-rotor ring (3) and the divergent portion is formed by the inner surface of the post-rotor ring (4). The rotor (5) rotation plane is located at the height of the throat of the pre-rotor ring (3), near its trailing edge. The rings (3, 4) are positioned relative to each other so that the lower part of the pre-rotor ring (3) is placed inside the upper part of the post-rotor ring (4). The gap (18) formed between them has the shape of an annular convergent nozzle accelerating the airflow flowing through it from the windward side. Moreover, the profile (13) of the upper ring (1) has a chord shorter by 10% to 50% than the profile (14) located below the base ring (2), with a lesser degree of arching of the skeleton line.

Description

Description of the invention

The subject of the invention is a palisade-ring-enclosed, bottom-rotor wind turbine with a vertical rotor rotation axis.

There are known wind turbines with the rotor rotation axis perpendicular to the wind direction, equipped with stationary steering devices that increase the efficiency of using wind energy into useful mechanical power.

US Patent No. 7400057 describes a wind-independent, enclosed turbine with a vertical rotor axis. The annular housing elements, with variable diameter and geometry, create a central, hollow chamber that expands significantly upward. Horizontally arranged rings curve the flow inside this chamber upward, directing it toward a single rotor connected to an electricity-generating device. This flow curvature is achieved by a suitably shaped, aeronautical cross-section of the rings, with a circular leading edge of finite radius and a sharply pointed trailing edge. The leading edges are located on the outer side of the rings, and the trailing edges are on the inner side, facing upward. The drive shaft connecting the rotor to the power generator passes through the entire turbine flow chamber. The chamber's outlet nozzle is located above the rotor and expands upward. The individual rings that make up the turbine housing vary in diameter and geometry, with a constant distance between the rings. The rings are connected by three walls spaced 120 degrees apart. The turbine's base is a single support connecting the lower part of the turbine to the ground. The turbine is a free-standing device, utilizing the free flow of air created by wind movement.

Patent description PL 218392 describes a wind-independent, enclosed wind turbine with a vertical axis of rotation and a horizontal rotor. It consists of a set of identical, horizontally arranged, one above the other, profiled rings with airfoil-shaped cross-sections and downward-facing trailing edges. The trailing edges form a flow channel with a constant internal diameter. The rings are connected by vertical teardrop-shaped elements that connect to four vertical supports that secure the turbine to the ground. The rotor is located at the bottom of the turbine, and the outlet nozzle located below it widens downward. The rotor is connected by a shaft to an electricity-generating device located on the ground to which the turbine is attached. Air flowing onto the turbine housing rings is deflected downward onto the rotor, which drives the electricity-generating device. This turbine is a free-standing device that utilizes the free airflow created by wind movement.

The aim of the invention is to develop a modernized wind turbine with a vertical rotor axis of rotation and an axisymmetric ring housing.

A palisade-annular housing, lower-rotor wind turbine with a vertical rotor axis of rotation, consisting of a palisade-annular housing formed by: an upper ring, at least one basic ring, a pre-rotor ring, and a post-rotor ring, arranged coaxially with respect to the rotor axis of rotation in horizontal planes one below the other, having cross-sections in the shape of a concave-convex airfoil with a rounded leading edge of finite radius and a sharply ended trailing edge in the lower part of the rings; three vertical supports attached to the ground, spaced every 120 degrees, the upper sections of which are connected to the housing rings; a rotor situated in the lower part of the housing, attached to the vertical supports by means of horizontal connectors; and a device for generating electric energy driven by a rotor, according to the invention is characterized in that the pre-rotor and post-rotor rings form a specific system of a slotted convergent-divergent channel surrounding the rotor, in which its convergent part is formed by the inner surface of the pre-rotor ring and the divergent part is formed by the inner surface of the post-rotor ring, wherein the plane of rotation of the rotor is located at the height of the throat of the pre-rotor ring, near its trailing edge, and the rings are positioned relative to each other in such a way that the lower part of the pre-rotor ring is placed inside the upper part of the post-rotor ring, and the slot formed between them has the shape of an annular convergent nozzle accelerating the air stream flowing through it from the windward side, and furthermore the profile of the upper ring has a chord shorter than

PL 227 429 B1

10% to 50% from the profile placed below the base ring, with a lesser degree of arching of the skeleton line.

It is advantageous if the inner wall of the rotor ring is shaped divergently below the trailing edge of the pre-rotor ring, and the profile of the rotor ring has a thickened and strongly arched trailing part on the upper surface, ending with a sharp edge.

In a preferred embodiment of the turbine, the top ring profile is an airfoil with standardized cross-sectional geometry coordinates as shown in Table 1, the base ring profile is an airfoil with standardized cross-sectional geometry coordinates as shown in Table 2, the pre-rotor ring profile is an airfoil with standardized cross-sectional geometry coordinates as shown in Table 3, and the post-rotor ring profile is an airfoil with standardized cross-sectional geometry coordinates as shown in Table 4.

In the invention's solution, individual rings form a palisade that deflects the airflow downward, toward the rotor's rotational plane. The axially symmetrical shape of the housing and its vertical positioning ensure the turbine operates independently of wind direction and eliminates the need for mechanisms to change the rotor's alignment. The shapes of the rings forming the turbine housing, their number, and relative positions have been aerodynamically designed to significantly increase the velocity of air flowing onto the horizontally rotating rotor relative to the velocity of the wind flowing onto the housing. This provides a significant increase in the energy of the air flowing onto the rotor blades, while maintaining the same rotor diameter, compared to other known technical solutions currently used.

The purpose of the gap created between the rotor and pre-rotor rings is to accelerate the airflow flowing through it from the windward side, which indirectly increases the airflow flowing through the rotor's rotating surface. The profile shape of the rotor ring, with a thickened and strongly arched trailing section on the upper surface, enhances the airflow sticking effect on the windward, inner, outlet section of the turbine housing and indirectly increases the airflow flowing through the rotor's rotating surface. The diameter and position of the upper ring relative to the uppermost base ring are selected to prevent the airflow flowing from the windward side from detaching from the upper surface of the uppermost base ring. The purpose of the basic rings is to deflect the air flow coming from the windward side and direct this flow downwards, perpendicularly to the rotor's rotating surface, and increasing the number of these rings increases the air flow through the rotor's rotating surface and increases the vertical dimension of the turbine.

The wind turbine being the subject of the invention assumes a variable design, i.e., a variable number of primary rings forming the housing. A larger number of primary rings increases the turbine's efficiency but also increases its dimensions. In specific applications, the number of primary rings is determined by a compromise between turbine efficiency and dimensions.

The modernized wind turbine, with a multi-segment, axisymmetric palisade-ring housing with the presented geometry, allows for an average airflow velocity through the horizontal turbine rotor approximately 45% greater than the wind speed reaching the turbine housing. This allows for approximately three times the power obtained from wind energy, regardless of wind direction, compared to conventional wind turbines with the same rotor diameter, oriented head-on. The features of the invention described above allow for increased energy yield from wind while simultaneously simplifying design and operation compared to existing solutions.

The subject of the invention is explained in an exemplary embodiment in the drawing, in which Fig. 1 shows a general view of a wind turbine with one basic ring, Fig. 2 shows a general view of a wind turbine with two basic rings, Fig. 3 shows a general view of a wind turbine with three basic rings, Fig. 4 shows a view of the wind turbine in a longitudinal section A-A along the axis of symmetry, Fig. 5 shows the wind turbine in a top view, Fig. 6 shows a cross-section B-B, perpendicular to the axis of symmetry of the turbine and passing through the elements fastening the power generator and the turbine rotor, Fig. 7 shows the wind turbine in a cross-section

PL 227 429 B1 longitudinal A-A with marked air flow lines through the turbine, marked with dashed lines with arrows, Fig. 8 shows the geometry of the airfoil of the upper ring, Fig. 9 shows the geometry of the airfoil of the basic ring, Fig. 10 shows the geometry of the airfoil of the pre-rotor ring, Fig. 11 shows the geometry of the airfoil of the post-rotor ring, and Fig. 12 shows the coordinate system in which the normalized coordinates (x, y) of the nodal points of the airfoils of the individual casing rings, referred to the chord c, are defined, presented in Table 1-4.

As shown in Fig. 1-6, the housing of a wind turbine with a vertical rotor axis 5 consists of an upper ring 1, one or two or three or more basic rings 2, a pre-rotor ring 3, and a post-rotor ring 4. In the lower part of the housing, at the height of the throat of the pre-rotor ring 3, a rotor 5 is placed, driving a generator 6 located underneath it that produces electricity. The housing rings are arranged coaxially with respect to the axis of rotation 17 of the rotor 5 in horizontal planes, one above the other. The cross-sections of the rings are in the shape of a concave-convex airfoil, with a rounded leading edge of finite radius and a sharply pointed trailing edge at the bottom of the rings.

The rings forming the turbine housing are connected by three vertical supports 7, spaced every 120 degrees, passing through the ring structure and connecting the turbine to the ground 11. The rotor ring 4, the rotor 5 and the power generator 6 are connected to the supports 7 by means of three horizontal connectors 8. In the lower and middle part of the turbine, the supports 7 are connected by horizontal stiffening elements 9, 12, lower and middle.

The pre-rotor and post-rotor rings 3, 4 form a specific system of a slotted convergent-divergent channel surrounding the rotor 5, in which its convergent part is formed by the inner surface of the pre-rotor ring 3 and the divergent part is formed by the inner surface of the post-rotor ring 4. These rings are arranged in relation to each other in such a way that the lower part of the pre-rotor ring (3) is placed inside the upper part of the post-rotor ring (4), and the gap 18 formed between them has the shape of an annular convergent nozzle accelerating the air stream flowing through it from the windward side, wherein the plane of rotation of the rotor 5 is situated at the height of the throat of the pre-rotor ring 3, near its trailing edge. Profile 13 of the upper ring 1 has a chord shorter by 10% to 50% than profile 14 located below the base ring 2, with a lesser degree of arching of the skeleton line. The inner wall of the post-rotor ring 4 is divergently shaped below the trailing edge of the pre-rotor ring (3), while profile 16 of the post-rotor ring 4 has a thickened and strongly arched trailing part on the upper surface, ending with a sharp edge.

In the exemplary embodiment of the turbine, the profile 13 of the upper ring 1 is an airfoil with standardized cross-sectional geometry coordinates as shown in Table 1, the profile 14 of the base ring is an airfoil with standardized cross-sectional geometry coordinates as shown in Table 2, the profile 15 of the pre-rotor ring 3 is an airfoil with standardized cross-sectional geometry coordinates as shown in Table 3, and the profile 16 of the post-rotor ring 4 is an airfoil with standardized cross-sectional geometry coordinates as shown in Table 4.

The operation of the turbine is as follows:

The rings forming the axially symmetric palisade are shaped and positioned so as to deflect the air flow coming from the windward side towards the rotating surface of the rotor 5 as effectively as possible. Thanks to the axial symmetry of the turbine, the effect of deflecting the air flow coming onto the housing from the windward side is independent of the wind direction and does not require any mechanisms to change the rotor position. Due to the air flow, rotor 5 rotates and drives the connected power generator 6. The air stream flowing from the windward side through the converging annular slot 18 is accelerated and adheres to the inner surface of rotor ring 4, which significantly increases the negative pressure on the upper surfaces above the rings 3, 2, the pre-rotor and main rings, and consequently increases the mass flow of air flowing through the rotating surface of rotor 5. In this case, rotor ring 4 acts analogously to a deflected slotted flap on an aircraft wing. Additionally, the appropriate shape and location of upper ring 1 cause the air stream flowing from the windward side to deflect and remain attached to the upper surface of the uppermost main ring 2. A disturbed flow zone is created behind the turbine. The air flow streamlines in the turbine symmetry plane are shown in Fig. 7 by dashed lines with arrows. In the wind turbine housing being the subject of the invention, variants are allowed, i.e. a variable number of basic rings 2. Fig. 1, Fig. 2 and Fig. 3 show a turbine housing in which one, two or three basic rings 2 are used, respectively. Based on the conducted tests, it was found that, at least in this range of the number of basic rings 2 used, increasing the number of rings 2 affects the increase in the mass flow of air flowing through the rotor's rotating surface.

T a b l e 1

Normalized coordinates of the upper ring airfoil.

cont.

x/c Vu/c x/c Vl/c x/e Yu/c x/c Vl/c 0.00000000 0.00000000 0.00000000 0.00000000 0.63243722 0.13919049 0.48114440 0.07189023 0.00034867 0.00530357 0.00021471 -000439944 0.65850432 0.13368411 0.51645466 0.07470757 0.00129806 0.01096594 0.00101931 -0.00872825 0.68306499 0.12810509 0.54979598 0.07630038 0.00284793 0.01697064 0.00262356 -001282229 0.70620684 0.12250450 0.58124534 0.07684521 0.00503322 0.02330236 0.00520597 -001637822 0.72801208 0.11692120 0.61088326 007650518 0.00790031 0.02994464 0.00857145 -0.01920998 0.74855778 0.11138469 0.63879277 007542829 0.01150213 0.03687902 0.01242625 -0.02133515 0.76791621 0.10591729 0.66505828 0.07374662 0.01589898 0.04408292 0.01655632 -002286479 0.78615523 0.10053576 0.68976438 0.07157644 0.02116006 0.05152687 0.02083173 -0.02392773 0.80333846 0.09525248 0.71299472 0.06901891 0.02735945 0.05917524 0.02586806 -0.02471037 0.81952566 0.09007633 0.73483121 0.06616118 0.03456965 0.06699108 0.03140940 -0.02514634 0.83477293 0.08501341 0.75535327 0.06307766 0.04286266 0.07493676 0.03747053 -0.02524306 0.84913293 0.08006756 0.77463735 0.05983137 0.05231247 0.08297286 0.04407694 -0.02500191 0.86265511 0.07524076 0.79275662 0.05647533 0.06299625 0.09105765 0.05126263 -0.02441863 0.87538587 0.07053351 0.80978073 0.05305381 0.07499546 0.09914609 0.05906799 -0.02347715 0.88736875 0.06594498 0.82577577 0.04960351 0.08839584 0.10718869 0.06753884 -0.02215379 0.89864454 0.06147325 0.84080421 0.04615464 0.10329390 0.11512854 0.07672836 -0.02043055 0.90925140 0.05711540 0.85492500 0.04273185 0.11979156 0.12289042 0.08669862 -0.01829685 0.91922497 0.05286755 0.86819368 0.03935508 0.13800114 0.13038647 0.09752170 -001574897 0.92859836 0.04872486 0.88066245 0.03604029 0.15803690 0.13752288 0.10927991 -0.01278779 0.93740218 0.04468142 0.89238036 0.03280004 0.18001679 0.14419972 0.12206521 -000941440 0.94566444 0.04073010 0.90339347 0.02964408 0.20406360 0.15030946 0.13597758 -0.00562339 0.95341032 0.03686211 0.91374501 0.02657978 0.23030594 0.15573484 0.15112292 -0.00139424 0.96066169 0.03306634 0.92347549 0.02361252 0.25887931 0.16034431 0.16761687 0.00329634 0.96743605 0.02932797 0.93262294 0.02074602 0.28992645 0.16398614 0.18558695 0.00846987 0.97374354 0.02562436 0.94122300 001798263 0.32359636 0.16648805 0.20517663 0.01413533 0.97957983 0.02191652 0.94930908 0.01532356 0.36004338 0.16766003 0.22654879 0.02028069 0.98492930 0.01816066 0.95691253 0.01276907 0.39942788 0.16731910 0.24988934 0.02686255 0.98977452 0.01432638 0.96406271 0.01031868 0.43886997 0.16552327 0.27540931 0.03379802 0.99410138 0.01040310 0.97078718 0.00797123 0.47608252 0.16261997 0.30334657 0.04095300 0.99788954 0.00638631 0.97711177 0.00572511 0.51117007 0.15888233 0.33396109 0.04814886 1.00112618 0.00229140 0.98306070 000357827 0.54424165 0.15452159 0.36752509 0.05519159 0.98865669 000152834 0.57540632 0.14970322 0.40432781 0.06184054 0.99392107 -0.00042729 0.60477061 0.14455806 0.44379192 0.06766509 0.99887382 -0.00229140

where, according to Fig. 12;

x - distance of the nodal point from the point with the smallest coordinate x measured along the profile chord, c - length of the profile chord, yU - distance of the nodal point lying on the upper, negative pressure part of the profile from the profile chord measured along a line perpendicular to the profile chord, yL - distance of the point lying on the lower, positive pressure part of the profile from the profile chord measured along a line perpendicular to the profile chord.

PL 227 429 B1

T a b l e 2

Normalized coordinates of the airfoil of the base ring.

cont.

x/c Yu/c x/c Yi/c x/c Yu/c x/c Yt/c 0.00000000 0.00000000 0.00000000 0.00000000 0.67589335 0.17795637 0.36288640 0.09322165 0.00008301 0.00507944 0.00013321 -0.00475471 0.69876961 0.17082573 0.40180017 0.09946087 0.00040986 0.01050218 0.00048777 -0.00949793 0.72038334 0.16373221 0.43988510 0.10368465 0.00101085 0.01628051 0.00108330 -0.01421686 0.74080360 0.15670479 0.47602910 0.10610315 0.00192008 0.02242618 0.00193987 -0.01889535 0.76009513 0.14976539 0.51026139 0.10705689 0.00317585 0.02895001 0.00308098 -002351253 0.77831858 0.14293035 0.54263492 0.10682473 0.00482068 0.03586149 0.00453412 -0.02804098 0 79553086 0.13621155 0.57321719 0.10563701 0.00690153 0.04326838 0.00632870 -003244501 0.81178534 0.12961736 0.60208416 0.10368487 0.00947048 0.05087604 0.00849291 -0.03667928 0.82713209 0.12315331 0.62931622 0.10112797 0.01258550 0.05898656 0.01105052 -004068775 0.84161814 0.11682265 0.6S499550 0.09810034 0.01630962 0.06749842 0.01402140 -004439960 0.85528762 0.11062680 0.67920387 0.09471368 0.02071209 0.07640525 0.01741986 -004772330 0.86818192 0.10456569 0.70202087 0.09105629 0.02586832 0.08569494 0.02124682 -005054108 0.88033990 0.09863800 0.72352297 0.08719851 0.03185965 0.09534870 0.02549060 -0.05267428 0.89179794 0.09284142 0.74378334 008319785 0.03877517 0.10533862 0.03009352 -005382158 0.90259014 0.08717284 0.76287162 0.07910102 0.04671458 0.11562359 0.03481974 -0.05354024 0.91274859 0.08162888 0.78085391 0.07494617 0.05578623 0.12614754 0.03927996 -005191371 0.92230350 0.07620603 0.79779289 007076486 0.06610289 0.13683994 0.04350395 -0.04972728 0.93127943 0.07089413 0.81374837 0.06658493 0.07778258 0.14761188 0.04766843 -0.04742837 0.93969956 0.06568430 0.82877727 0.06243057 0.09094340 0.15835820 0.05180151 -0.04507343 0.94758450 0.06056704 0.84293334 0.05832152 0.10570176 0.16895646 0.05647496 -0.04233779 0.95495167 0.05553143 0.85626732 0.05427382 0.12216287 0.17927945 0.06158052 -0.03927827 0.96181451 0.05056462 0.86882724 0.05030098 0.14042355 0.18919310 0.06716399 -0.03586882 0.96818090 0.04565052 0.88065861 0.04641453 0.16058301 0.19853715 0.07327808 -0.03208416 0.97404582 0.04076260 0.89180433 0.04262368 0.18273388 0.20713578 0.07998327 -0.02790017 0.97937311 0.03584877 0.90230486 0.03893560 0.20695937 0.21480299 0.08734801 -0.02329319 0.98410161 0.03085170 0.91219824 0.03535574 0.23333167 0.22135040 0.09544584 -0.01823433 0.98819505 0.02576294 0.92152032 0.03188805 0.26191269 0.22659606 0.10435859 -0.01269352 0.99167079 0.02062870 0.93030480 0.02853518 0.29275724 0.23037242 0.11418018 -0.00664435 0.99458237 0.01551294 0.93858338 0.02529874 0.32591841 0.23253064 0.12501921 -0.00006725 0.99700193 0.01047550 0.94638590 0.02217937 0.36145352 0.23293837 0.13700004 0.00704969 0.99901273 0.00556576 0.95374037 0.01917696 0.39942899 0.23146601 0.15026723 0.01470345 1.00069961 0.00081948 0.96067317 0.01629072 0.43754661 0.22822916 0.16498749 0.02287208 0.96720907 0.01351934 0.47358668 0.22374648 0.18135210 0.03150815 0.97337135 0.01086102 0.50764369 0.21837179 0.19957862 0.04053108 0.97918191 0.00831361 0.53981896 0.21235944 0.21990902 0.04982361 0.98466134 0.00587466 0.57021407 0.20589831 0.24260977 0.05922092 0.98982895 0.00354144 0.59892757 0.19913088 0.26796699 0.06850692 0.99470292 0.00131104 0.62605351 0.19216572 0.29627179 0.07743904 0.99930039 -0.00081948 0.65168085 0.18508616 0.32781234 0.08577195

where, according to Fig. 12;

x - distance of the nodal point from the point with the smallest coordinate x measured along the profile chord, c - length of the profile chord, yU - distance of the nodal point lying on the upper, negative pressure part of the profile from the profile chord measured along a line perpendicular to the profile chord, yL - distance of the point lying on the lower, positive pressure part of the profile from the profile chord measured along a line perpendicular to the profile chord.

PL 227 429 B1

T a b l e 3

Normalized coordinates of the pre-rotor ring airfoil.

cont.

x/c Vu/e x/c Vi/C X/C Yu/c x/c Yl/c 0.00000000 0.00000000 0.00000000 0.00000000 0.76329802 0.15617527 022054951 0.08952686 000014530 0.00532498 0.00005269 -0.00510411 0.78129548 0.14895687 0.24276926 0.10087851 0.00051809 0.01102208 0.00030185 -0.01020243 0.79826096 0.14181155 0.26780325 0.11179794 0.00115562 0.01710781 0.00075667 -0.01528650 081425067 0.13475833 0.29593263 012192078 0.00209941 0.02359774 0.00142704 -0.02034663 0.82931800 012781322 0.32742498 013081199 0.00339567 0.03050605 0.00232365 -0.02537154 0.84351372 0.12098979 0.36252044 0.13797592 0.00509572 0.03784506 0.00345803 -0.03034812 0.85688612 0.11429957 0.40142057 0.14288143 0.00725652 0.04562454 0.00484260 -0.03526090 0.86948120 0.10775238 044127472 0.14496486 0.00994124 0.05385099 0.00649074 -0.04009155 088134274 0.10135646 0.47894315 0.14453938 0.01322011 0.06252654 0.00841679 -0.04481815 0.89251252 0.09511894 051443241 014232342 0.01717156 0.07164746 0.01063604 -0.04941423 0.90302879 0.08904307 0.54782281 013891572 0.02188470 0.08120161 0.01316462 -0.05384746 0.91292198 0.08312140 0.57922588 0.13473186 002745525 0.09116851 0.01601917 -0.05807786 0.92221569 0.07733869 0.60875536 0.13002197 0.03398210 0.10152004 0.01921632 -0.06205526 0.93093034 007167871 0.63652323 0.12496494 0.04157360 0.11221528 0.02277149 -0.06571552 0.93908366 006612535 0.66263688 011969263 0.05034580 0.12319902 0.02669658 -0.06897489 094669021 006066222 0.68719670 011429752 0.06042403 0.13439725 0.03099499 -0.07172124 0.95376428 005527696 0.71029618 0.10884557 0.07194151 0.14571368 0.03565231 -0.07379689 0.96031610 004995624 0.73202232 0.10338408 0.08503409 0.15703001 0.04061241 -0.07496063 0.96635325 0.04468812 0.75245614 0.09794718 0.09983507 0.16820719 0.04569502 -0.07481929 0.97188386 0.03946589 0.77167328 0.09255986 0.11647323 0.17908444 0.05036566 -0.07285858 0.97691521 0.03428618 0.78974454 0.08724063 0.13506856 0.18948208 0.05384020 -0.06915382 0.98145774 002915201 080673635 0.08200355 015571747 0.19922997 0.05666292 -0.06490068 0.98553981 002408340 0.82271120 007685952 0.17849942 0.20816988 0.05949849 -0.06065595 098920126 0.01910681 0.83772795 0.07181725 0.20349201 0.21613143 0.06237207 -0.05643687 0.99248728 0.01424818 0.85184220 0.06688379 023076480 0.22295330 0.06528401 -0.05224417 099544904 0.00953269 0.86510642 0.06206489 0.26038356 0.22848718 0.06823463 -0.04807860 0.99813494 0.00497941 0.87757039 005736570 0.29241544 0.23259695 0.07137827 -0.04372987 1.00056957 0.00059099 0.88928104 005279020 0.32693377 0.23515330 0.07486909 -0.03900592 0.90028339 004834309 0.36402116 0.23602435 0.07875010 -0.03387976 091061916 0.04402616 0.40376984 0.23506381 0.08307046 -0.02832390 0.92032718 003983928 044179736 0.23250007 0.08788642 -0.02231084 092944426 0.03578222 0.47778222 0.22871257 0.09326239 -0.01581374 093800516 003185443 0.51180626 0.22398429 0.09927222 -0.00880734 0.94604274 002805514 0.54395826 0.21853151 0.10600060 -0.00126917 095358809 0.02438334 0.57432887 0.21252313 0.11354464 0.00681890 0.96067054 0.02083779 0.60300798 0.20609340 0.12201568 0.01546848 0.96731783 0.01741705 063008325 0.19935070 0.13154129 0.02468180 0.97355614 0.01411948 0.65563809 0.19237879 0.14226758 0.03444776 0.97941016 001094322 0.67975284 0.18524788 0.15436190 0.04473644 0.98490324 0.00788627 0.70250461 0.17801716 0.16801378 0.05549374 0.99005741 0.00494660 0.72396687 0.17073573 0.18343562 0.06663489 099489314 000212138 0.74420933 0.16344403 0.20086232 0.07803633 0.99943043 -000059099

where, according to Fig. 12;

x - distance of the nodal point from the point with the smallest coordinate x measured along the profile chord, c - length of the profile chord, yU - distance of the nodal point lying on the upper, negative pressure part of the profile from the profile chord measured along a line perpendicular to the profile chord, yL - distance of the point lying on the lower, positive pressure part of the profile from the profile chord measured along a line perpendicular to the profile chord.

PL 227 429 B1

T a b l e 4

Normalized coordinates of the rotor ring airfoil.

cont.,

x/c Yu/e x/c Yl/c x/c ΫυΑ x/c Yl/c 0.00000000 0.00000000 0.00000000 0.00000000 0.81637677 0.22380090 0.22465470 0.09943300 0.00013894 0.00527202 0.00005076 -0.00489973 0.83431893 0.21817164 0.24692957 0.10952218 0.00050096 0.01091277 0.00028247 -0.00979419 0.85111012 0.21186718 0.27175865 0.11899245 0.00112273 0.01693880 0.00070324 -0.01467601 0.86668570 0.20479610 0.29933844 0.12755496 0.00204512 0.02336575 0.00132178 -0.01953670 0.88086004 0.19672444 0.32985256 0.13488821 0.00331362 0.03020795 0.00214746 -0.02436648 0.89322852 0.18728139 0.36346730 0.14064927 0.00497877 0.03747791 0.00319036 -0.02915400 0.90428333 0.17737616 0.40033063 0.14449234 0.00709670 0.04518572 0.00446131 -0.03388604 0.91431096 0.16737446 0.43826988 0.14606587 0.00972964 0.05333826 0.00597196 -0.03854702 0.92324315 0.15724318 0.47421794 0.14560400 0.01294681 0.06193822 0.00773475 -0.04311851 0.93114095 0.14706406 0 50819891 0.14364010 0.01682543 0.07098261 0.00976296 -0.04757847 0.93811487 0.13694489 0.54028091 0.14059871 0.02145331 0.08046028 0.01207061 -0.05190031 0.94427098 0.12696898 0.57055408 0.13680304 0.02692516 0.09035180 0.01467231 -0.05605156 0.94972608 0.11720825 0.59911442 0.13247969 0.03333892 0.10063024 0.01758288 -0.05999213 0.95459222 0.10771725 0.62605786 0.12779511 0.04080154 0.11125639 0.02081666 -0.06367166 0.95896769 0.09853265 0.65147753 0.12287505 0.04942789 0.12217701 0.02438615 -0.06702582 0.96293702 0.08967753 0.67546132 0.11781024 0.05934187 0.13332064 0.02829943 -0.06997047 0.96657158 0.08116479 0.69809153 0.11266643 0.07067572 0.14459384 0.03255433 -0.07239321 0 96993080 0.07299986 0.71944501 0.10749143 0.08356397 0.15588216 0.03712880 -0.07413328 0.97306371 0.06518287 0.73959359 0.10232021 0.09814102 0.16704826 0.04195112 -0.07494177 0.97601035 0.05771015 0.75860445 0.09717855 0.11454176 0.17792554 0.04680209 -0.07442310 0.97880325 0.05057541 0.77654060 0.09208574 0.13288960 0.18832943 0.05109760 -0.07214562 0.98146858 0.04377054 0.79346125 0.08705640 0.15328833 0.19807266 0.05423428 -0.06840143 0.98402728 0.03728624 0.80942221 0.08210184 0.17582038 0.20698057 0.05681324 -0.06423559 0.98649593 0.03111241 0.82447615 0.07723106 0.20054905 0.21490873 0.05920907 -0.05996116 0.98888752 0.02523847 0.83867287 0.07245133 0.22752371 0.22176849 0.06153547 -0 05564838 0.99121210 0.01965353 0.85205955 0.06776868 0.25679050 0.22754814 0.06387734 -0.05134399 0.99347742 0.01434666 0.86468086 0.06318804 0.28840587 0.23232580 0.06634118 -0.04695273 0.99568876 0.00930666 0.87657931 0.05871397 0.32244817 0.23627238 0.06909095 -0.04222147 0.99785694 0.00452559 0.88779510 0.05434992 0.35902571 0.23962382 0.07216342 -0.03712973 1.00000000 0.00000000 0.89836692 0.05010017 0.39828072 0.24259964 0.07560065 -0.03165687 0.90833081 0.04596666 0.43641370 0.24502389 0.07945047 -0.02578279 0.91772036 0.04194941 0.47281183 0.24689448 0.08376732 -0.01948850 0.92656744 0.03804834 0.50754908 0.24825190 0.08861303 -0.01275684 0.93490228 0.03426315 0.54069724 0.24909886 0.09405778 -0.00557339 0.94275356 0.03059331 0.57232392 0.24941477 0.10018106 0.00207232 0.95014845 0.02703813 0.60249141 0.24920375 0.10707266 0.01018545 0.95711271 0.02359669 0.63125780 0.24847677 0.11483369 0.01876397 0.96367076 0.02026794 0.65867700 0.24723738 0.12357756 0.02779661 0.96984573 0.01705061 0.68479837 0.24548447 0.13343080 0.03726018 0.97565952 0.01394332 0.70966651 0.24321467 0.14453372 0.04711656 0.98113286 0.01094447 0.73332096 0.24042247 0.15704067 0.05730915 0.98628543 0.00805247 0.75579568 0.23709971 0.17111984 0.06775888 0.99113576 0.00526543 0.77711827 0.23323452 0.18695237 0.07835995 0.99570113 0.00258092 0.79730865 0.22880983 0.20473050 0.08897538 1.00000000 0.00000000

where, according to Fig. 12;

x - distance of the nodal point from the point with the smallest coordinate x measured along the profile chord, c - length of the profile chord, yU - distance of the nodal point lying on the upper, negative pressure part of the profile from the profile chord measured along a line perpendicular to the profile chord, yL - distance of the point lying on the lower, positive pressure part of the profile from the profile chord measured along a line perpendicular to the profile chord.

Claims (6)

1. A ring-cased, bottom-rotor wind turbine with a vertical axis of rotation of the rotor, consisting of a palisade-ring casing consisting of: an upper ring (1), at least one main ring (2), a pre-rotor ring (3 ) and the rotor ring (4), located coaxially with the axis of rotation (17) of the rotor (5) in horizontal planes one below the other, having cross-sections in the shape of a concave-convex air profile, with a rounded leading edge with a finite radius and a pointed edge runoff at the bottom of the rings; three vertical supports (7) attached to the ground (11) spaced every 120 degrees, the upper sections of which are connected to the rings of the housing; a rotor (5) located in the lower part of the housing, fastened to the vertical supports (7) by horizontal fasteners (8); and an electric power generating device (6) driven by the rotor (5), characterized in that the pre-rotor (3) and rotor (4) rings form a specific arrangement of a convergent-divergent slot channel surrounding the rotor (5), in which its the tapered part is formed by the inner surface of the pre-rotor ring (3) and the divergent part is formed by the inner surface of the rotor ring (4), with the rotor's spinning plane (5) located at the height of the pre-rotor ring throat (3) near its trailing edge, and the rings (3, 4) are positioned relative to each other such that the lower part of the pre-rotor ring (3) is located inside the upper part of the rotor ring (4), and the gap (18) formed therebetween. ) has the shape of an annular convergent nozzle accelerating the air stream flowing through it from the windward side, and moreover, the profile (13) of the upper ring (1) has a chord Less than 10% to 50% of the profile (14) placed below the base ring (2), with a lesser degree of curvature of the skeleton line. 2. The wind turbine according to claim 1 The impeller ring (4) is shaped divergently below the trailing edge of the rotor ring (3), and the profile (16) of the impeller ring (4) has a thickened and strongly arched on its upper surface, the trailing edge with a sharp edge . 3. The wind turbine according to claim 1 The method of claim 1, characterized in that the profile (13) of the upper ring (1) is an aviation profile with normalized cross-sectional geometry coordinates as shown in Table 1. 4. The wind turbine according to claim 1 The method of claim 1, characterized in that the profile (14) of the base ring is an aviation profile with normalized cross-sectional geometry coordinates as shown in Table 2. 5. The wind turbine according to claim 1 3. A method according to claim 1, characterized in that the profile (15) of the rotor ring (3) is an aviation profile with normalized cross-sectional geometry coordinates as shown in Table 3. 6. The wind turbine according to claim 6 The rotor ring profile (4) according to claim 1, characterized in that the profile (16) of the rotor ring (4) is an aviation profile with normalized cross-sectional geometry coordinates as shown in Table 4.