JP2000110790A5 - - Google Patents

Download PDF

Info

Publication number
JP2000110790A5
JP2000110790A5 JP1998281672A JP28167298A JP2000110790A5 JP 2000110790 A5 JP2000110790 A5 JP 2000110790A5 JP 1998281672 A JP1998281672 A JP 1998281672A JP 28167298 A JP28167298 A JP 28167298A JP 2000110790 A5 JP2000110790 A5 JP 2000110790A5
Authority
JP
Japan
Prior art keywords
blade
outer peripheral
axial
groove
predetermined
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.)
Granted
Application number
JP1998281672A
Other languages
Japanese (ja)
Other versions
JP2000110790A (en
JP4153601B2 (en
Filing date
Publication date
Application filed filed Critical
Priority to JP28167298A priority Critical patent/JP4153601B2/en
Priority claimed from JP28167298A external-priority patent/JP4153601B2/en
Publication of JP2000110790A publication Critical patent/JP2000110790A/en
Publication of JP2000110790A5 publication Critical patent/JP2000110790A5/ja
Application granted granted Critical
Publication of JP4153601B2 publication Critical patent/JP4153601B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【０００７】
【課題を解決するための手段】
請求項１の発明は、ボス部周りに複数の翼を配設した軸流送風機において、上記各翼の負圧面の前縁部と外周部にのみ、もしくはそれらの一部にのみ、空気の流れ方向と交差する複数の溝を形成した軸流送風機である。 0007
[Means for solving problems]
The invention according to claim 1, in the axial flow fan which is disposed a plurality of blades around the boss, only the front edge portion and the outer peripheral portion of the negative pressure surface of each blade or only a portion thereof, the flow of air It is an axial blower in which a plurality of grooves intersecting with each other are formed.

この発明によれば、各翼の前縁部と外周部にのみ、もしくはそれらの一部にのみ形成された複数の溝により、各翼の翼面流れの層流から乱流への遷移が促進されることにより、空気流れの剥離が抑制される。しかも、各溝は、空気流れに交差する方向に形成されているので、空気流れの方向の変化に対する自由度を得ることができるとともに、溝の設置範囲を、流れの剥離抑制に有効で、かつ比較的肉厚の前縁部と外周部とに設定しているので、流れの剥離抑制効果と各翼の強度確保を共に図ることができる。 According to the present invention, the front edge portion and the outer peripheral portion of each wing only, or by a plurality of grooves formed only on a part thereof, the transition from laminar flow wing surface flow of each blade to turbulent flow promoting By doing so, the separation of the air flow is suppressed. Moreover, since each groove is formed in a direction intersecting the air flow, it is possible to obtain a degree of freedom against a change in the direction of the air flow, and the installation range of the groove is effective in suppressing the separation of the flow. Since the front edge portion and the outer peripheral portion are set to be relatively thick, it is possible to achieve both the effect of suppressing flow separation and ensuring the strength of each blade.

そして、図１、図３にも示すように軸流送風機１は各翼３の負圧面３ａ側の前縁部３ｂと、外周部３ｃとに、図３中、太線矢印で示す空気流れに交差する方向に延びる細溝からなる複数のリブレット４をそれぞれ形成している。ここで空気流れに交差する方向とは直交と斜交とを含む。 Then, as shown in FIGS. 1 and 3, the axial blower 1 intersects the air flow indicated by the thick arrow in FIG. 3 at the front edge portion 3b and the outer peripheral portion 3c on the negative pressure surface 3a side of each blade 3. Each of a plurality of riblets 4 formed of narrow grooves extending in the direction of the air is formed. Here, the direction intersecting the air flow includes orthogonality and oblique crossing.

【００８１】
【発明の効果】
以上説明したように本発明によれば、各翼の前縁部と外周部にのみ、もしくはその一部にのみ形成した複数の溝により、各翼の翼面流れの層流から乱流への遷移が促進されることにより、空気流れの剥離が抑制される。しかも、各溝は、空気流れに交差する方向に形成されているので、空気流れの方向の変化に対する自由度を得ることができるとともに、溝の設置範囲を、流れ剥離抑制に有効な各翼の前縁部と外周部に設定しているので、流れの剥離抑制効果と各翼の強度確保を共に図ることができる。 [0081]
【Effect of the invention】
According to the present invention described above, only the front edge portion and the outer peripheral portion of each wing, or a plurality of grooves formed only on a part thereof, from laminar flow wing surface flow of each blade to turbulent flow By promoting the transition, the separation of the air flow is suppressed. Moreover, since each groove is formed in a direction intersecting the air flow, it is possible to obtain a degree of freedom against a change in the direction of the air flow, and the installation range of the groove can be set for each blade which is effective in suppressing flow separation. Since it is set at the front edge portion and the outer peripheral portion, it is possible to achieve both the effect of suppressing flow separation and ensuring the strength of each blade.

Claims (5)

ボス部周りに複数の翼を配設した軸流送風機において、上記各翼の負圧面の前縁部と外周部にのみ、もしくはそれらの一部にのみ、空気の流れ方向と交差する複数の溝を形成したことを特徴とする軸流送風機。In the axial blower in which a plurality of blades are arranged around the boss portion, a plurality of grooves intersecting the air flow direction only at the front edge portion and the outer peripheral portion of the suction surface of each blade or only at a part thereof. An axial flow blower characterized by forming. 前記溝はその長手方向に複数形成したことを特徴とする軸流送風機。 An axial blower characterized in that a plurality of the grooves are formed in the longitudinal direction . 各溝は、その溝幅を、各翼の最大翼弦長の０．２〜１．０％に設定する一方、その溝深さを、この溝幅の２０％以上で且つ、翼厚みの５０％以下に設定していることを特徴とする請求項１および２のいずれか１項に記載の軸流送風機。 Each groove has its groove width set to 0.2 to 1.0% of the maximum chord length of each blade, while its groove depth is 20% or more of this groove width and 50 blade thickness. The axial blower according to claim 1, wherein the axial blower is set to be equal to or less than% . 各溝は、各翼の前縁端及び外周端から各々所定距離内方までの所定の範囲内にて形成され、これらの各所定距離は各翼の最大翼弦長の５〜１５％であることを特徴とする請求項１〜３のいずれか１項に記載の軸流送風機。 Each groove is formed within a predetermined range from the leading edge and outer peripheral edge of each blade to a predetermined distance inward, and each of these predetermined distances is 5 to 15% of the maximum chord length of each blade. The axial-flow fan according to any one of claims 1 to 3, wherein: 各溝は、各翼の前縁端及び外周端から所定距離内方にて、所定幅でこの前縁端及び外周端に沿う所定領域内にそれぞれ形成され、これらの各所定領域は、その各外周側一端までの所定距離が各翼の最大翼弦長の１〜３％、その各内周側一端までの所定距離が最大翼弦長の５〜１５％にそれぞれ設定されていることを特徴とする請求項１〜４のいずれか１項に記載の軸流送風機。 Each groove is formed in a predetermined area in a predetermined distance inward from a front edge end and an outer peripheral end of each wing, with a predetermined width, in a predetermined area along the front edge end and the outer peripheral end. A predetermined distance to one end of the outer peripheral side is set to 1 to 3% of the maximum chord length of each wing, and a predetermined distance to one end of each inner peripheral side is set to 5 to 15% of the maximum chord length. The axial-flow fan according to any one of claims 1 to 4 .
JP28167298A 1998-10-02 1998-10-02 Axial blower Expired - Fee Related JP4153601B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28167298A JP4153601B2 (en) 1998-10-02 1998-10-02 Axial blower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28167298A JP4153601B2 (en) 1998-10-02 1998-10-02 Axial blower

Publications (3)

Publication Number Publication Date
JP2000110790A JP2000110790A (en) 2000-04-18
JP2000110790A5 true JP2000110790A5 (en) 2005-08-18
JP4153601B2 JP4153601B2 (en) 2008-09-24

Family

ID=17642380

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28167298A Expired - Fee Related JP4153601B2 (en) 1998-10-02 1998-10-02 Axial blower

Country Status (1)

Country Link
JP (1) JP4153601B2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW524928B (en) * 2001-04-26 2003-03-21 Daikin Ind Ltd Blower and air conditioner with the same
CN204878059U (en) * 2014-12-17 2015-12-16 依必安-派特穆尔芬根股份有限两合公司 Blade and fan wheel
EP3321511B1 (en) * 2015-08-10 2020-09-16 Mitsubishi Electric Corporation Air blower and air conditioning device equipped with air blower
WO2019021468A1 (en) * 2017-07-28 2019-01-31 三菱電機株式会社 Propeller fan and refrigeration cycle device
DE102022213765A1 (en) * 2022-12-16 2024-06-27 Ziehl-Abegg Se Turbomachine and method for producing a component of a turbomachine that carries a flow medium

Similar Documents

Publication Publication Date Title
JP4973249B2 (en) Multi-wing fan
CN102828997B (en) Axial flow blower
JP5430754B2 (en) Axial blower
JP2005337258A5 (en)
JP2011516345A5 (en)
US20130323098A1 (en) Axial flow blower
JP2001140601A5 (en)
US20190120253A1 (en) Propeller fan
WO2008000616A3 (en) Static mixer comprising at least one couple of blades for generating an eddy flow in a duct
EP0942175A4 (en) Centrifugal blower, method of manufacturing the same, and air-conditioner provided with the same
CN106121734B (en) Blade, gas turbine comprising such a blade, and method for manufacturing such a blade
JP2010133254A (en) Centrifugal blower, and air conditioner provided with the same
JP2008002378A (en) Multiblade fan
JP6405529B2 (en) Blower
JP2000110790A5 (en)
JPH10176847A (en) Outdoor machine for air conditioner
JP2021038675A5 (en)
JP2009528220A (en) Aircraft wing
TWI821411B (en) Blades and axial flow impeller using the blades
CN110939603A (en) Blade and axial flow impeller using same
US20140003957A1 (en) Wind turbine rotor blade with a profile with a thick trailing edge
CN110285091A (en) A kind of fan blade
JP3008930B2 (en) Impeller for blower
KR101852572B1 (en) Axial Fan
JPH086712B2 (en) Blower