A global approach to turbomachinery flow control loss reduction using endwall suction and midspan vortex generator jet blowing
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: A global approach to turbomachinery flow control loss reduction using endwall suction and midspan vortex generator jet blowing
A global approach to turbomachinery flow control loss reduction using endwall suction and midspan vortex generator jet blowing
A Global Approach to Turbomachinery Flow Control: Loss Reduction using Endwall Suction and Midspan Vortex Generator Jet BlowingDissertationPresented i A global approach to turbomachinery flow control loss reduction using endwall suction and midspan vortex generator jet blowing in Partial Fulfillment of the Reqmrements for the Degree Doctor of Philosophy in the Graduate School of The Ohio State UniversityByMatthew Jon Bloxham. M.S.Graduate Program in Aeronautical and Astronautical EngineeringThe Ohio State University2010Dissertation CommitteeJeffrey p. Bons. AdvisorJim Gre A global approach to turbomachinery flow control loss reduction using endwall suction and midspan vortex generator jet blowing goryJen-Ping ChenMohammad Samimyhttps://khothuvien.cori!AbstractA flow control scheme using endwall suction and vortex generator jet (VGJ) blowing wasA global approach to turbomachinery flow control loss reduction using endwall suction and midspan vortex generator jet blowing
employed 111 an effort to reduce the turbine passage losses associated with the endwall flow field and midspan separation. Unsteady midspan control aA Global Approach to Turbomachinery Flow Control: Loss Reduction using Endwall Suction and Midspan Vortex Generator Jet BlowingDissertationPresented i A global approach to turbomachinery flow control loss reduction using endwall suction and midspan vortex generator jet blowing ntrol was the horseshoe vortex system. The addition of leading edge endwall suction resulted m an area-average total pressure loss reduction of 57%. The minimal additional gains achieved with leading edge endwall suction showed that the hoiseshoe vortex was a secondary conti ibutor to endwall loss p A global approach to turbomachinery flow control loss reduction using endwall suction and midspan vortex generator jet blowing roduction (primary contributor- passage vortex).A similar flow control strategy was then employed with an emphasis on passage vortex (PV) control. DurA global approach to turbomachinery flow control loss reduction using endwall suction and midspan vortex generator jet blowing
ing the design, a theoretical model was used that effectively predicted the trajectory of the passage vortex. The model required inviscid results obtaA Global Approach to Turbomachinery Flow Control: Loss Reduction using Endwall Suction and Midspan Vortex Generator Jet BlowingDissertationPresented i A global approach to turbomachinery flow control loss reduction using endwall suction and midspan vortex generator jet blowing moval approach was the direct application of flow control on the endwall below the passage vortex trajectory. The redirection approach attempted to alter the trajectory of the pv by removing boundary layer fluid through judiciously placed suction holes. Suction hole positions were chosen using a pot A global approach to turbomachinery flow control loss reduction using endwall suction and midspan vortex generator jet blowing ential flow model that emphasized the alignment of the endwall flow field with inviscid streamlines. Model results were validated using flow visualizaA global approach to turbomachinery flow control loss reduction using endwall suction and midspan vortex generator jet blowing
tion and particle image velocimetry (PỈV) in a linear turbine cascade comprised of the highly-loaded Li A blade profile.iiDetailed wake total pressureA Global Approach to Turbomachinery Flow Control: Loss Reduction using Endwall Suction and Midspan Vortex Generator Jet BlowingDissertationPresented i A global approach to turbomachinery flow control loss reduction using endwall suction and midspan vortex generator jet blowing B. of 2. When compared with the no control results, the addition of steady VGJs and endwall suction reduced the wake losses by 69°O (removal approach) and 68% (redirection approach) The majority of the total pressure loss reduction resulted from the steady spanwise VGJs. while the suction schemes pr A global approach to turbomachinery flow control loss reduction using endwall suction and midspan vortex generator jet blowing ovided modest additional reductions (<2%). At 2?<’Cr=5OOOO. the endwall control effectiveness was assessed for a range of suction rates without midspaA global approach to turbomachinery flow control loss reduction using endwall suction and midspan vortex generator jet blowing
n I'GJs Areaaverage total pressure loss reductions of up to 28% were measured in the wake at 2teor=S0000. B=o. with applied endwall suction employed uA Global Approach to Turbomachinery Flow Control: Loss Reduction using Endwall Suction and Midspan Vortex Generator Jet BlowingDissertationPresented i A global approach to turbomachinery flow control loss reduction using endwall suction and midspan vortex generator jet blowing sional PỈỈ' showed that the endwall suction changed the location of the pv eliminating its influence on the suction surface of the turbine blade More significantly, suction w ith the removal approach removed the comer vortex (CIO increasing the available span by more than 10%. The redirection approa A global approach to turbomachinery flow control loss reduction using endwall suction and midspan vortex generator jet blowing ch was less effective at higher suction rates due to the continual presence of the cv.A system analysis was also performed that compared the power neeA global approach to turbomachinery flow control loss reduction using endwall suction and midspan vortex generator jet blowing
ded to operate the flow control system (combined suction and PGJs) to the power gained by the system The power gains were assessed by comparing the chA Global Approach to Turbomachinery Flow Control: Loss Reduction using Endwall Suction and Midspan Vortex Generator Jet BlowingDissertationPresented i A global approach to turbomachinery flow control loss reduction using endwall suction and midspan vortex generator jet blowing % of the total power gained was needed to operate the flow control system for an LI A rotor at 2tecr=5OOOO, B=2.iiiDedicationI dedicate this dissertation to my family. Mary Catherine. Claire, and Luke. The frustrationsand stress of work quickly vanish in their presence I am also indebted to my paren A global approach to turbomachinery flow control loss reduction using endwall suction and midspan vortex generator jet blowing ts. Mark andKerry Bloxham. for their encouragement and support.ivAcknow ỉedgmculs1 wish to thank my advisor. Dr. Jeffrey Bons, for his guidance and frA global approach to turbomachinery flow control loss reduction using endwall suction and midspan vortex generator jet blowing
iendship. 1 adnihe his example in all facets of life. This resear ch could not have been performed without the sponsorship of the National AeronauticsA Global Approach to Turbomachinery Flow Control: Loss Reduction using Endwall Suction and Midspan Vortex Generator Jet BlowingDissertationPresented i A global approach to turbomachinery flow control loss reduction using endwall suction and midspan vortex generator jet blowing y, Jonathon Pluim, Rebecca Hollis, and Clifford Whitfield was paramount.VA Global Approach to Turbomachinery Flow Control: Loss Reduction using Endwall Suction and Midspan Vortex Generator Jet BlowingDissertationPresented iGọi ngay
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