Invention Grant
- Patent Title: Diffuser with backward facing step having varying step height
- Patent Title (中): 具有向后台阶的扩散器具有变化的台阶高度
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Application No.: US13468157Application Date: 2012-05-10
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Publication No.: US09109466B2Publication Date: 2015-08-18
- Inventor: Kin Pong Lo , John K. Eaton
- Applicant: Kin Pong Lo , John K. Eaton
- Applicant Address: US CA Palo Alto
- Assignee: THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY
- Current Assignee: THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY
- Current Assignee Address: US CA Palo Alto
- Main IPC: F01D25/30
- IPC: F01D25/30
Abstract:
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 (Hpeak, HvaIley) 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.
Public/Granted literature
- US20130019583A1 DIFFUSER WITH BACKWARD FACING STEP HAVING VARYING STEP HEIGHT Public/Granted day:2013-01-24
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