JP2004169610A - Propeller - Google Patents

Propeller Download PDF

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Publication number
JP2004169610A
JP2004169610A JP2002336055A JP2002336055A JP2004169610A JP 2004169610 A JP2004169610 A JP 2004169610A JP 2002336055 A JP2002336055 A JP 2002336055A JP 2002336055 A JP2002336055 A JP 2002336055A JP 2004169610 A JP2004169610 A JP 2004169610A
Authority
JP
Japan
Prior art keywords
windmill
blade
propeller
multiblade
low
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP2002336055A
Other languages
Japanese (ja)
Inventor
Ko Yamaguchi
甲 山口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP2002336055A priority Critical patent/JP2004169610A/en
Publication of JP2004169610A publication Critical patent/JP2004169610A/en
Pending legal-status Critical Current

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction

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  • Wind Motors (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a propeller with large motive power, capable of rotating from low wind velocity, having less turbulence of a slip stream, a narrow width, high rotation speed, and excellent energy conversion efficiency, by making good use of the advantages of a multiblade windmill and a propeller windmill. <P>SOLUTION: A blade 1 of the multiblade windmill has a blade tip with a wide trapezoidal shape and has high-lift power and large motive power, but has low rotation speed due to induction resistance. A blade 1 of the propeller windmill has a sharp triangular shape and has high rotation speed, but has low motive power and low torque. Eddy of the blade tip generated at the blade 1 of the multiblade windmill in the front row is used for generating lifting power of the propeller windmill in the rear row. The blade 1 of the multiblade windmill has a shorter width than the blade 1 of the propeller windmill due to the law of conservation of angular momentum. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明が属する技術分野】
本発明は、プロペラの構造に関するものである。
【0002】
【従来の技術】
多翼形風車は周速比で1までは理想風車であるが、それ以上の周速比になると誘導抵抗のために効率が悪くなる。
【0003】
プロペラ型風力発電機の弊害は主にタービンの高速回転が原因となっている。空気は粘性が低いことや3翼という少ない翼数では最高効率点が高い領域になる。騒音問題が心配される場合には、住宅地域まで約300m離れることが環境条件となる。鳥獣保護問題や危険イメージからくる不安問題がある。ナイフが高速回転するようなプロペラ型風力発電機では日本の環境に配置することはできない。日本の風は山、森、ビルなどが比較的近い地域にあるためその周辺の風況は乱れ成分が多く含まれている。そのような条件下で台風も多く、狭い国土に人口密度の高い日本の実情に合わない。
【0004】
垂直軸型風力発電機は垂直軸型風車の下に発電機を置くために重心が低く、プロペラが風を切る音も発生しない。山、森、ビルなどが比較的近くにあるために発生する乱れ成分が多く含まれた風況にも対応できる。しかし抗力のみの利用であると高速回転はできない。
【0005】
風力発電量の採算性に関して日本では風況の良い場所が非常に限られており、それ以外の場所では事業として利益を生み出すのは困難な状態ともいえる。
【0006】
【発明が解決しようとする課題】
解決しようとする問題点は、自然エネルギーの不規則性と低密度性に関してである。
【0007】
【課題を解決するための手段】
本発明は、前列のブレードに発生する翼端渦を次列のブレードの揚力に利用することを最も主要な特徴とする。
【0008】
【発明の実施の形態】
本発明は、コアンダ効果とベルヌーイの定理を利用する。コアンダ効果は噴流が物体の面に沿って流れる性質で、曲がったブレードによって噴流も曲がるが、この反作用としてブレードには揚力が加わる。噴流に巻き込まれた空気はブレードのわん曲によって流路が狭くなり、狭くなったところの空気流速が速くなり、ベルヌーイの定理によって静圧が低くなり揚力が加わる。
【0009】
【実施例】
図1、図2に示すようにブレードの枚数を調整することで地域の特性と利用方法に対応することができる。図1はソリディティ比が低く低トルク、高速回転であり、発電用に適している。図2はソリディティ比が高く、高トルク、低速回転であり、揚水用に適している。
【0010】
【発明の効果】
以上説明したように本発明のプロペラは起動力が大きく回転数も高くなる。理想風車の周速比とパワー係数の曲線に近づくことができる。
【図面の簡単な説明】
【図1】四枚翼の正面図である。
【図2】八枚翼の正面図である。
【図3】四枚翼の斜視図である。
【図4】八枚翼の斜視図である。
【図5】ブレードにおける気流の斜視図である。
【図6】前流と後流の流れの斜視図である。
【符号の説明】
1 ブレード
2 ワイヤー
3 ハブ
4 集風装置
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a structure of a propeller.
[0002]
[Prior art]
A multi-blade wind turbine is an ideal wind turbine with a peripheral speed ratio of up to 1, but at a peripheral speed ratio higher than that, efficiency becomes poor due to induction resistance.
[0003]
The disadvantages of propeller type wind power generators are mainly due to the high speed rotation of the turbine. Air has a high efficiency point with low viscosity and a small number of blades, such as three blades. If the noise problem is a concern, the environmental condition is to be about 300 m away from the residential area. There is a problem of birds and beasts protection and anxiety caused by danger images. A propeller-type wind generator with a knife rotating at high speed cannot be deployed in a Japanese environment. The wind in Japan is relatively close to mountains, forests and buildings, so the surrounding wind conditions contain a lot of turbulent components. Under such conditions, there are many typhoons, which do not fit the situation of Japan, which is densely populated in a narrow country.
[0004]
The vertical axis wind generator has a low center of gravity because the generator is placed under the vertical axis wind turbine, and the sound of the propeller cutting off the wind does not occur. It is possible to cope with wind conditions that include a lot of turbulence components that occur because mountains, forests, buildings, etc. are relatively close. However, high speed rotation is not possible if only drag is used.
[0005]
Regarding the profitability of wind power generation, there are very few places in Japan with good wind conditions, and it can be said that it is difficult to generate profits as a business elsewhere.
[0006]
[Problems to be solved by the invention]
The problem to be solved is related to the irregularity and low density of renewable energy.
[0007]
[Means for Solving the Problems]
The most important feature of the present invention is to utilize the tip vortex generated in the front row blades for the lift of the next row blades.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention utilizes the Coanda effect and Bernoulli's theorem. The Coanda effect is a property in which the jet flows along the surface of the object. The jet is also bent by the bent blade, but as a reaction, lift is applied to the blade. The air entrained in the jet has a narrow flow path due to the curvature of the blade, the air flow velocity at the narrowed area is increased, and the static pressure is reduced due to Bernoulli's theorem, and lift is applied.
[0009]
【Example】
By adjusting the number of blades as shown in FIGS. 1 and 2, it is possible to cope with local characteristics and usage. FIG. 1 has a low solidity ratio, low torque and high-speed rotation, and is suitable for power generation. FIG. 2 shows a high solidity ratio, high torque and low-speed rotation, and is suitable for pumping.
[0010]
【The invention's effect】
As described above, the propeller of the present invention has a large starting force and a high rotation speed. It is possible to approach the curve of the peripheral speed ratio and the power coefficient of the ideal wind turbine.
[Brief description of the drawings]
FIG. 1 is a front view of a four-bladed wing.
FIG. 2 is a front view of eight wings.
FIG. 3 is a perspective view of a four-bladed wing.
FIG. 4 is a perspective view of eight wings.
FIG. 5 is a perspective view of an airflow in a blade.
FIG. 6 is a perspective view of the upstream and downstream flows.
[Explanation of symbols]
1 blade 2 wire 3 hub 4 wind collector

Claims (1)

風向きに対して前列のブレードの翼端の渦が線状の物質に絡みながら、次列のブレードに流入することで、翼端渦の噴流を空気の粘性により揚力を増大することでエネルギー変換効率を高めるプロペラ。The vortex at the tip of the blade in the front row is entangled with the linear material in the wind direction and flows into the next row of blades. Enhance propeller.
JP2002336055A 2002-11-20 2002-11-20 Propeller Pending JP2004169610A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002336055A JP2004169610A (en) 2002-11-20 2002-11-20 Propeller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002336055A JP2004169610A (en) 2002-11-20 2002-11-20 Propeller

Publications (1)

Publication Number Publication Date
JP2004169610A true JP2004169610A (en) 2004-06-17

Family

ID=32700002

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002336055A Pending JP2004169610A (en) 2002-11-20 2002-11-20 Propeller

Country Status (1)

Country Link
JP (1) JP2004169610A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105736240A (en) * 2016-03-15 2016-07-06 西北工业大学 Fan blade steel cable connecting device in mechanical braking state
CN105736239A (en) * 2016-03-15 2016-07-06 西北工业大学 Fan blade steel cable connecting device in release state of mechanical braking system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105736240A (en) * 2016-03-15 2016-07-06 西北工业大学 Fan blade steel cable connecting device in mechanical braking state
CN105736239A (en) * 2016-03-15 2016-07-06 西北工业大学 Fan blade steel cable connecting device in release state of mechanical braking system

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