Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: flat plates

Sortuj według:

Ogranicz wyniki do:

The Total Sound Power Radiated by a Circular Plate with a Hole in Its Center

Rdzanek W. J., Rdzanek W. P. Jr., Engel Z.

Mechanika / Akademia Górniczo-Hutnicza im. St. Staszica

2003

T. 22, z. 3

395-403

The total sound power has been analyzed theoretically as well as experimentally to verify the validity of some effective approximate formulations obtained purely analytically. The acoustic system discussed covers an annular plate embedded into a flat infinite baffe. The external edge of the piąte is elastically supported, but cannot make any transverse deflections. The internal edge is clamped rigidly into a roller which vibrated harmonically with a known velocity. The modal analysis of some axissymmetric vibrations has been used for the whole theoretical analysis. Some effective approximate methods have been used to determine the values of the self- and mutualpower. The validity of the theoretical results obtained has been verified by some measurements madę in an anechoic chamber.

Lift characteristics of a supercritical airfoil with controlled separation in a subsonic flow

Artamonova L., Chernov L., Radtsig A., Semenchikov N., Tarkov E.

Research Bulletin / Warsaw University of Technology, Institute of Aeronautics and Applied Mechanics

2001

nr 11

1-6

The results of experimental investigations into supercritical airfoil aerodynamics are presented. The airfoil has cross-sectional bulkheads of different heights fitted to the airfoil. The bulkheads were mounted for an active control of flow separation. The tests were carried out at the free-stream speed V[infinity] = 47 m/s within the range of angles of attack alpha= 0 ... 10 degrees. The pressure distribution around the airfoil and airfoil aerodynamic normal force, lift and drag coefficients were found. The bulkheads fitted in the airfoil leading edge neighbourhood have proved to be effective means allowing for the control of flow separation and lift of supercritical airfoils.