Aerodynamic excitation of the harmonium reed

Autor:	Theodore A. Wilson, Arthur O. St Hilaire, Gordon S. Beavers
Rok vydání:	1971
Předmět:	Physics Flow visualization Jet (fluid) Mechanical Engineering Flow (psychology) Data_CODINGANDINFORMATIONTHEORY Mechanics Aerodynamics Wake Condensed Matter Physics Vibration Aerodynamic force Mechanics of Materials Potential flow Hardware_ARITHMETICANDLOGICSTRUCTURES
Zdroj:	Journal of Fluid Mechanics. 49:803-816
ISSN:	1469-7645 0022-1120
DOI:	10.1017/s0022112071002374
Popis:	An investigation of the mechanism responsible for the self-excited oscillations of a harmonium reed is presented. Experiments show that the amplitude of vibration of the reed grows exponentially, and measurements of the growth rate as a function of the flow past the reed are reported. Flow visualization studies lead to the conclusion that jet or wake instability is not important in exciting the reed vibration. An analysis of the flow around the reed as an unsteady potential flow results in the evaluation of the aerodynamic forces exciting the reed. The analysis shows that the pressure which excites the reed motion is of the order of $\rho U_0\dot{a}$, where U0 is the flow velocity and $\dot{a}$ is the reed velocity.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cd4b38e9ef519802fa53f712d6eccc2a https://doi.org/10.1017/s0022112071002374 Zobrazit plný text záznamu