Matches in SemOpenAlex for { <https://semopenalex.org/work/W2044914967> ?p ?o ?g. }
Showing items 1 to 68 of
68
with 100 items per page.
- W2044914967 endingPage "4460" @default.
- W2044914967 startingPage "4450" @default.
- W2044914967 abstract "Abstract Tonal noise generated by axial fans at the Blade Passage Frequency and its harmonics is a source of discomfort for low-speed fans used in many cooling and ventilation applications. The noise control approach presented here is based on the interference between the unsteady aerodynamic blade loads responsible for tonal noise generation and secondary aerodynamic loads generated in the rotor plane by fixed, carefully positioned, small obstructions in the upstream flow. Although not strictly active control, the magnitude and phase of the secondary tonal noise can be adjusted by varying the axial distance between the rotor and the obstruction, and the circumferential position of the obstruction, respectively. An optimal position of the obstruction generally exists, that minimizes the total noise at a given frequency. This paper establishes a practical method for automatic positioning of such control obstructions. In a first step, the method searches for the optimal axial distance between the rotor and the obstruction using a slowly rotating control obstruction. The modulation created by the rotation of the obstruction allows for the primary and secondary noises to be distinguished in the frequency response of the sound field. The steepest descent algorithm is used to find the optimal axial distance, for which the magnitudes of the primary and secondary tonal noise are equal at the error microphone. Then, the optimal angular position of the obstruction is obtained by slowly rotating the obstruction until minimal total noise is achieved. Finally, it is shown that at the optimal axial and angular position, the BPF tone, which produced the largest area in the loudness pattern, has been greatly reduced." @default.
- W2044914967 created "2016-06-24" @default.
- W2044914967 creator A5010442238 @default.
- W2044914967 creator A5031171119 @default.
- W2044914967 creator A5056501168 @default.
- W2044914967 creator A5061700845 @default.
- W2044914967 date "2013-09-01" @default.
- W2044914967 modified "2023-09-25" @default.
- W2044914967 title "Use of a beat effect for the automatic positioning of flow obstructions to control tonal fan noise: Theory and experiments" @default.
- W2044914967 cites W2003220845 @default.
- W2044914967 cites W2013840503 @default.
- W2044914967 cites W2015676065 @default.
- W2044914967 cites W2084524653 @default.
- W2044914967 cites W2135090365 @default.
- W2044914967 cites W35758832 @default.
- W2044914967 doi "https://doi.org/10.1016/j.jsv.2013.03.023" @default.
- W2044914967 hasPublicationYear "2013" @default.
- W2044914967 type Work @default.
- W2044914967 sameAs 2044914967 @default.
- W2044914967 citedByCount "6" @default.
- W2044914967 countsByYear W20449149672014 @default.
- W2044914967 countsByYear W20449149672015 @default.
- W2044914967 countsByYear W20449149672017 @default.
- W2044914967 countsByYear W20449149672018 @default.
- W2044914967 crossrefType "journal-article" @default.
- W2044914967 hasAuthorship W2044914967A5010442238 @default.
- W2044914967 hasAuthorship W2044914967A5031171119 @default.
- W2044914967 hasAuthorship W2044914967A5056501168 @default.
- W2044914967 hasAuthorship W2044914967A5061700845 @default.
- W2044914967 hasConcept C115961682 @default.
- W2044914967 hasConcept C121332964 @default.
- W2044914967 hasConcept C154945302 @default.
- W2044914967 hasConcept C189809214 @default.
- W2044914967 hasConcept C24890656 @default.
- W2044914967 hasConcept C28490314 @default.
- W2044914967 hasConcept C41008148 @default.
- W2044914967 hasConcept C99498987 @default.
- W2044914967 hasConceptScore W2044914967C115961682 @default.
- W2044914967 hasConceptScore W2044914967C121332964 @default.
- W2044914967 hasConceptScore W2044914967C154945302 @default.
- W2044914967 hasConceptScore W2044914967C189809214 @default.
- W2044914967 hasConceptScore W2044914967C24890656 @default.
- W2044914967 hasConceptScore W2044914967C28490314 @default.
- W2044914967 hasConceptScore W2044914967C41008148 @default.
- W2044914967 hasConceptScore W2044914967C99498987 @default.
- W2044914967 hasFunder F4320323931 @default.
- W2044914967 hasFunder F4320338081 @default.
- W2044914967 hasIssue "19" @default.
- W2044914967 hasLocation W20449149671 @default.
- W2044914967 hasOpenAccess W2044914967 @default.
- W2044914967 hasPrimaryLocation W20449149671 @default.
- W2044914967 hasRelatedWork W185733981 @default.
- W2044914967 hasRelatedWork W1964971699 @default.
- W2044914967 hasRelatedWork W1984560925 @default.
- W2044914967 hasRelatedWork W2000794185 @default.
- W2044914967 hasRelatedWork W2007991918 @default.
- W2044914967 hasRelatedWork W2055774276 @default.
- W2044914967 hasRelatedWork W2059769631 @default.
- W2044914967 hasRelatedWork W2086069289 @default.
- W2044914967 hasRelatedWork W2279382477 @default.
- W2044914967 hasRelatedWork W2778699561 @default.
- W2044914967 hasVolume "332" @default.
- W2044914967 isParatext "false" @default.
- W2044914967 isRetracted "false" @default.
- W2044914967 magId "2044914967" @default.
- W2044914967 workType "article" @default.