Zobrazeno 1 - 10
of 28
pro vyhledávání: '"David E. Ashpis"'
Autor:
David E. Ashpis, Douglas R. Thurman
Publikováno v:
International Journal of Turbo & Jet-Engines. 36:157-173
We address requirements for laboratory testing of AC Dielectric Barrier Discharge (AC-DBD) plasma actuators for active flow control in aviation gas turbine engines. The actuator performance depends on the gas discharge properties, which, in turn, dep
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa7b4dd1a2fdbdb1984b2b588448285e
https://doi.org/10.1515/tjj-2018-0021
https://doi.org/10.1515/tjj-2018-0021
Autor:
Lennart S. Hultgren, David E. Ashpis
Publikováno v:
AIAA Journal. 56:4614-4620
Active flow control of boundary-layer separation using dielectric barrier discharge (DBD) plasma actuators is studied experimentally. Separation is induced on a flat plate installed in a closed-circuit wind tunnel by a shaped insert on the opposite w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::597d632508770e6158cf219419037732
https://doi.org/10.2514/1.j056976
https://doi.org/10.2514/1.j056976
Autor:
Matthew C. Laun, David E. Ashpis
Publikováno v:
AIAA Journal. 55:3807-3816
Results of thrust measurements of dielectric barrier discharge plasma actuators are presented. The test setup, measurement, and data processing methodology that were developed in prior work were us...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f98a8ea75f321b28a48e96b51ed8fb23
https://doi.org/10.2514/1.j055925
https://doi.org/10.2514/1.j055925
Publikováno v:
AIAA Journal. 55:2254-2268
The accurate measurement of power consumption by dielectric barrier discharge plasma actuators is a challenge due to the characteristics of the actuator current signal. Microdischarges generate high-amplitude, high-frequency current spike transients
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d78abbf1416f1792c05473f68695180
https://doi.org/10.2514/1.j055816
https://doi.org/10.2514/1.j055816
Autor:
David E. Ashpis, Matthew C. Laun
The thrust of the dielectric barrier discharge plasma actuator is the plasma body force minus the wall shear force, and it equals the net induced momentum. Thrust measurement simplicity makes it a good metric of the aerodynamic performance for active
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c050253516399267dab3cab0c152c63f
https://europepmc.org/articles/PMC6530993/
https://europepmc.org/articles/PMC6530993/
Autor:
Matthew C. Laun, David E. Ashpis
Publikováno v:
47th AIAA Plasmadynamics and Lasers Conference.
Results of characterization of Dielectric Barrier Discharge (DBD) plasma actuators without external flow are presented. The results include aerodynamic and electric performance of the actuators without external flow for different geometrical paramete
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb14677e048b44609c68caf9837e8738
https://doi.org/10.2514/6.2016-4013
https://doi.org/10.2514/6.2016-4013
Autor:
David E. Ashpis, Flint O. Thomas, P. G. Huang, Thomas Corke, Paul I. King, Junhui Huang, James Lake, Ralph J. Volino, Yildirim Suzen
Publikováno v:
Journal of Turbomachinery. 129:527-541
A transport equation for the intermittency factor is employed to predict the transitional flows in low-pressure turbines. The intermittent behavior of the transitional flows is taken into account and incorporated into computations by modifying the ed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6f040f6f196987be3788b9f9cde33442
https://doi.org/10.1115/1.2218888
https://doi.org/10.1115/1.2218888
Publikováno v:
Journal of Fluids Engineering. 127:503-513
The present study, which is the first of a series of investigations dealing with specific issues of low pressure turbine (LPT) boundary layer aerodynamics, is aimed at providing detailed unsteady boundary flow information to understand the underlying
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3946a2283f5739a3c08e4659abf0896f
https://doi.org/10.1115/1.1905646
https://doi.org/10.1115/1.1905646
Publikováno v:
Journal of Turbomachinery. 129:92-107
The paper experimentally studies the effects of periodic unsteady wake flow and Reynolds number on boundary layer development, separation, reattachment, and the intermittency behavior along the suction surface of a low pressure turbine blade. Extensi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc8ac009994c963d98cb4b9bdbbce8ad
https://doi.org/10.1115/1.2219762
https://doi.org/10.1115/1.2219762
Publikováno v:
Journal of Turbomachinery. 125:455-464
A new transport equation for the intermittency factor was proposed to predict separated and transitional boundary layers under low-pressure turbine airfoil conditions. The intermittent behavior of the transitional flows is taken into account and inco
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d09e6dc2a1e4a0b5994ba778b63aba87
https://doi.org/10.1115/1.1580159
https://doi.org/10.1115/1.1580159