Turbine outlet diffuser
US-2015361985-A1 · Dec 17, 2015 · US
Diffuser with backward facing step having varying step height
US9109466B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9109466-B2 |
| Application number | US-201213468157-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 10, 2012 |
| Priority date | Jul 22, 2011 |
| Publication date | Aug 18, 2015 |
| Grant date | Aug 18, 2015 |
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- Title
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Abstract
Official abstract text for this publication.
A diffuser ( 30 ) expanding a gas flow (F) upstream of a heat recovery steam generator ( 32 ) of a combined cycle power plant ( 34 ). An outer wall ( 44 ) of the diffuser includes a smoothly lofted backward facing step ( 46 ) effective to fix a location of a flow recirculation bubble ( 56 ) under conditions conducive to flow separation. The step has a varying step height (H peak , H vaIley ) about a circumference of the step edge ( 62 ). The varying step height segments the recirculation bubble into small cells ( 66 ) located downstream of each peak ( 58 ) of the step height and reducing a reattachment length (L) of the bubble, thereby facilitating a reduction of the overall length of the diffuser.
First claim
Opening claim text (preview).
The invention claimed is: 1. A diffuser comprising: a generally conical shaped outer wall defining an inlet, a generally expanding cross-sectional area in a flow direction, and an outlet larger than the inlet; a first constant diameter region downstream of the inlet; a second constant diameter region comprising a diameter larger than the first constant diameter region and disposed downstream of the first constant diameter region; a diffusing region disposed between the secon…
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Classifications
Mechanical Engineering · mapped topic
- F01D25/30Primary
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
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- What does patent US9109466B2 cover?
- A diffuser ( 30 ) expanding a gas flow (F) upstream of a heat recovery steam generator ( 32 ) of a combined cycle power plant ( 34 ). An outer wall ( 44 ) of the diffuser includes a smoothly lofted backward facing step ( 46 ) effective to fix a location of a flow recirculation bubble ( 56 ) under conditions conducive to flow separation. The step has a varying step height (H peak , H vaIley ) ab…
- Who is the assignee on this patent?
- Lo Kin Pong, Eaton John K, Univ Leland Stanford Junior
- What technology area does this patent fall under?
- Primary CPC classification F01D25/30. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Aug 18 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).