JP2012202242A5 - - Google Patents
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- JP2012202242A5 JP2012202242A5 JP2011065223A JP2011065223A JP2012202242A5 JP 2012202242 A5 JP2012202242 A5 JP 2012202242A5 JP 2011065223 A JP2011065223 A JP 2011065223A JP 2011065223 A JP2011065223 A JP 2011065223A JP 2012202242 A5 JP2012202242 A5 JP 2012202242A5
- Authority
- JP
- Japan
- Prior art keywords
- exhaust
- inner cylinder
- strut
- diffuser according
- exhaust gas
- 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
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Description
本発明の排気ディフューザにおいて、内筒の周方向の全域にわたって縮径する縮径部とすることができるが、ストラットが接合される部分及びその周囲にのみ縮径領域を形成した縮径部とすることができる。ストラットに当たった排気ガスの流れは、内筒の外周面などの壁面側に押しやられる。このため、ストラットの近くの領域は、内筒の外周面で排気ガスが剥離しにくい。そこで、ストラットと内筒との接合部分及びその周囲の領域だけを縮径させるものである。
本発明の排気ディフューザにおいて、縮径部は、傾斜角度を５〜１５°の範囲とすることが好ましく、また、縮径部における内筒と外筒の間の排気流路の高さＴとストラットの前縁から後縁に到る排気ガスが流れる方向の長さＬの比（Ｔ／Ｌ）を、０．５〜２．０の範囲とする、ことが好ましい。
In the exhaust diffuser of the present invention, the reduced diameter portion can be reduced in diameter over the entire circumferential direction of the inner cylinder, but the reduced diameter portion is formed with a reduced diameter region only at the portion where the strut is joined and the periphery thereof. be able to. The flow of the exhaust gas hitting the strut is pushed to the wall surface side such as the outer peripheral surface of the inner cylinder. For this reason, in the area near the strut, the exhaust gas is difficult to peel off on the outer peripheral surface of the inner cylinder. Therefore, only the joint portion between the strut and the inner cylinder and the surrounding area are reduced in diameter.
In the exhaust diffuser of the present invention, the reduced diameter portion preferably has an inclination angle in the range of 5 to 15 °, and the height T of the exhaust flow path between the inner cylinder and the outer cylinder in the reduced diameter portion and the struts. It is preferable that the ratio (T / L) of the length L in the direction in which the exhaust gas from the leading edge to the trailing edge flows is in the range of 0.5 to 2.0.
Claims (6)
前記内筒の周囲に配置され、前記内筒との間に排気流路が形成される外筒と、
前記排気流路内に設けられ、内筒と外筒を繋ぐストラットと、を備え、
前記ストラットは、
前記排気流路を排気ガスが流れる方向の上流側に位置する前縁と、
前記排気ガスが流れる方向の下流側に位置する後縁と、を備え、
前記内筒は、
前記排気ガスが流れる方向の上流側の所定の開始位置から下流側の端部の終了位置にかけて径が縮径する縮径部、を備え、
前記前縁と前記開始位置、及び、前記後縁と前記終了位置、の各々が、前記排気ガスが流れる方向において一致するように設定されている、
ことを特徴とする排気ディフューザ。 An inner cylinder,
An outer cylinder disposed around the inner cylinder and having an exhaust passage formed between the inner cylinder;
A strut provided in the exhaust passage and connecting the inner cylinder and the outer cylinder;
The strut is
A leading edge located upstream of the exhaust gas flow direction in the exhaust flow path;
A rear edge located on the downstream side in the direction in which the exhaust gas flows, and
The inner cylinder is
A diameter-reducing portion whose diameter is reduced from a predetermined start position on the upstream side in the direction in which the exhaust gas flows to an end position on the downstream end,
Each of the front edge and the start position, and the rear edge and the end position are set to coincide with each other in a direction in which the exhaust gas flows.
Exhaust diffuser characterized by that.
前記後縁が、前記外筒から前記内筒に向けて下降するように傾斜される、
請求項１に記載の排気ディフューザ。 The strut is
The trailing edge is inclined so as to descend from the outer cylinder toward the inner cylinder;
The exhaust diffuser according to claim 1.
前記ストラットが接合される部分及びその周囲にのみ形成される、
請求項１又は２に記載の排気ディフューザ。 The reduced diameter portion is
Formed only at and around the part where the struts are joined,
The exhaust diffuser according to claim 1 or 2.
請求項１〜請求項３のいずれか一項に記載の排気ディフューザ。The exhaust diffuser according to any one of claims 1 to 3.
請求項１〜請求項４のいずれか一項に記載の排気ディフューザ。The exhaust diffuser according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011065223A JP5693315B2 (en) | 2011-03-24 | 2011-03-24 | Exhaust diffuser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011065223A JP5693315B2 (en) | 2011-03-24 | 2011-03-24 | Exhaust diffuser |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2012202242A JP2012202242A (en) | 2012-10-22 |
| JP2012202242A5 true JP2012202242A5 (en) | 2014-04-10 |
| JP5693315B2 JP5693315B2 (en) | 2015-04-01 |
Family
ID=47183517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2011065223A Active JP5693315B2 (en) | 2011-03-24 | 2011-03-24 | Exhaust diffuser |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5693315B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9611756B2 (en) * | 2012-11-02 | 2017-04-04 | General Electric Company | System and method for protecting components in a gas turbine engine with exhaust gas recirculation |
| JP6033154B2 (en) * | 2013-03-29 | 2016-11-30 | 三菱重工業株式会社 | Axial-flow rotating machine and diffuser |
| US10167782B2 (en) | 2013-09-10 | 2019-01-01 | Siemens Aktiengesellschaft | Cooling air line for removing cooling air from a manhole of a gas turbine |
| US11274563B2 (en) * | 2016-01-21 | 2022-03-15 | General Electric Company | Turbine rear frame for a turbine engine |
| WO2018124068A1 (en) | 2016-12-26 | 2018-07-05 | 三菱重工業株式会社 | Turbine and gas turbine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR807926A (en) * | 1935-05-16 | 1937-01-25 | Improvements in aircraft propulsion systems | |
| US2809491A (en) * | 1950-11-27 | 1957-10-15 | Solar Aircraft Co | Diffuser tailcone |
| JPS63100640U (en) * | 1986-12-19 | 1988-06-30 | ||
| EP0581978B1 (en) * | 1992-08-03 | 1996-01-03 | Asea Brown Boveri Ag | Multi-zone diffuser for turbomachine |
| US7272930B2 (en) * | 2003-09-25 | 2007-09-25 | Siemens Power Generation | Exhaust diffuser assembly with tunable velocity profile |
-
2011
- 2011-03-24 JP JP2011065223A patent/JP5693315B2/en active Active
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