Noise of Axial Cooling Fans at Partial Flow Rates

578 Views
253 Downloads
Export citation: ABNT
ČUDINA, Mirko .
Noise of Axial Cooling Fans at Partial Flow Rates. 
Strojniški vestnik - Journal of Mechanical Engineering, [S.l.], v. 41, n.5-6, p. 145-156, november 2017. 
ISSN 0039-2480.
Available at: <https://www.sv-jme.eu/article/noise-of-axial-cooling-fans-at-partial-flow-rates/>. Date accessed: 22 nov. 2019. 
doi:http://dx.doi.org/.
Čudina, M.
(1995).
Noise of Axial Cooling Fans at Partial Flow Rates.
Strojniški vestnik - Journal of Mechanical Engineering, 41(5-6), 145-156.
doi:http://dx.doi.org/
@article{.,
	author = {Mirko  Čudina},
	title = {Noise of Axial Cooling Fans at Partial Flow Rates},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {41},
	number = {5-6},
	year = {1995},
	keywords = {axial cooling; noise; fans; partial flow; },
	abstract = {An axial cooling fan in an air-cooled diesel engine is one of the important noise sources. The main characteristics of axial flow fans are instabilities in their performance and noise characteristics at partial flow rate. The instabilities in fan operation are a consequence of rotating stalls created in the rotor blade and/or in guide vane cascade. The rotating stalls cause a steep increase in the emitted noise and lower the performances of the fan. At some operation conditions the rotating stalls also cause an appearance of surge. The surge points determine the surge line which represents the lowest region of fan operation. At given operation conditions and fan’s geometry, the surge line depends on the nature and intensity of the rotating stalls. In the available literature there are different explanations of the rotating stall generation and its influence on the emitted noise level and its spectra. The present paper highlights these phenomena using the theory of cascades and noise spectra analysis. Correlation between the discrete frequency of the non-rotational noise caused by the rotational stall and rotational frequency of the fan is also provided.},
	issn = {0039-2480},	pages = {145-156},	doi = {},
	url = {https://www.sv-jme.eu/article/noise-of-axial-cooling-fans-at-partial-flow-rates/}
}
Čudina, M.
1995 November 41. Noise of Axial Cooling Fans at Partial Flow Rates. Strojniški vestnik - Journal of Mechanical Engineering. [Online] 41:5-6
%A Čudina, Mirko 
%D 1995
%T Noise of Axial Cooling Fans at Partial Flow Rates
%B 1995
%9 axial cooling; noise; fans; partial flow; 
%! Noise of Axial Cooling Fans at Partial Flow Rates
%K axial cooling; noise; fans; partial flow; 
%X An axial cooling fan in an air-cooled diesel engine is one of the important noise sources. The main characteristics of axial flow fans are instabilities in their performance and noise characteristics at partial flow rate. The instabilities in fan operation are a consequence of rotating stalls created in the rotor blade and/or in guide vane cascade. The rotating stalls cause a steep increase in the emitted noise and lower the performances of the fan. At some operation conditions the rotating stalls also cause an appearance of surge. The surge points determine the surge line which represents the lowest region of fan operation. At given operation conditions and fan’s geometry, the surge line depends on the nature and intensity of the rotating stalls. In the available literature there are different explanations of the rotating stall generation and its influence on the emitted noise level and its spectra. The present paper highlights these phenomena using the theory of cascades and noise spectra analysis. Correlation between the discrete frequency of the non-rotational noise caused by the rotational stall and rotational frequency of the fan is also provided.
%U https://www.sv-jme.eu/article/noise-of-axial-cooling-fans-at-partial-flow-rates/
%0 Journal Article
%R 
%& 145
%P 12
%J Strojniški vestnik - Journal of Mechanical Engineering
%V 41
%N 5-6
%@ 0039-2480
%8 2017-11-11
%7 2017-11-11
Čudina, Mirko.
"Noise of Axial Cooling Fans at Partial Flow Rates." Strojniški vestnik - Journal of Mechanical Engineering [Online], 41.5-6 (1995): 145-156. Web.  22 Nov. 2019
TY  - JOUR
AU  - Čudina, Mirko 
PY  - 1995
TI  - Noise of Axial Cooling Fans at Partial Flow Rates
JF  - Strojniški vestnik - Journal of Mechanical Engineering
DO  - 
KW  - axial cooling; noise; fans; partial flow; 
N2  - An axial cooling fan in an air-cooled diesel engine is one of the important noise sources. The main characteristics of axial flow fans are instabilities in their performance and noise characteristics at partial flow rate. The instabilities in fan operation are a consequence of rotating stalls created in the rotor blade and/or in guide vane cascade. The rotating stalls cause a steep increase in the emitted noise and lower the performances of the fan. At some operation conditions the rotating stalls also cause an appearance of surge. The surge points determine the surge line which represents the lowest region of fan operation. At given operation conditions and fan’s geometry, the surge line depends on the nature and intensity of the rotating stalls. In the available literature there are different explanations of the rotating stall generation and its influence on the emitted noise level and its spectra. The present paper highlights these phenomena using the theory of cascades and noise spectra analysis. Correlation between the discrete frequency of the non-rotational noise caused by the rotational stall and rotational frequency of the fan is also provided.
UR  - https://www.sv-jme.eu/article/noise-of-axial-cooling-fans-at-partial-flow-rates/
@article{{}{.},
	author = {Čudina, M.},
	title = {Noise of Axial Cooling Fans at Partial Flow Rates},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {41},
	number = {5-6},
	year = {1995},
	doi = {},
	url = {https://www.sv-jme.eu/article/noise-of-axial-cooling-fans-at-partial-flow-rates/}
}
TY  - JOUR
AU  - Čudina, Mirko 
PY  - 2017/11/11
TI  - Noise of Axial Cooling Fans at Partial Flow Rates
JF  - Strojniški vestnik - Journal of Mechanical Engineering; Vol 41, No 5-6 (1995): Strojniški vestnik - Journal of Mechanical Engineering
DO  - 
KW  - axial cooling, noise, fans, partial flow, 
N2  - An axial cooling fan in an air-cooled diesel engine is one of the important noise sources. The main characteristics of axial flow fans are instabilities in their performance and noise characteristics at partial flow rate. The instabilities in fan operation are a consequence of rotating stalls created in the rotor blade and/or in guide vane cascade. The rotating stalls cause a steep increase in the emitted noise and lower the performances of the fan. At some operation conditions the rotating stalls also cause an appearance of surge. The surge points determine the surge line which represents the lowest region of fan operation. At given operation conditions and fan’s geometry, the surge line depends on the nature and intensity of the rotating stalls. In the available literature there are different explanations of the rotating stall generation and its influence on the emitted noise level and its spectra. The present paper highlights these phenomena using the theory of cascades and noise spectra analysis. Correlation between the discrete frequency of the non-rotational noise caused by the rotational stall and rotational frequency of the fan is also provided.
UR  - https://www.sv-jme.eu/article/noise-of-axial-cooling-fans-at-partial-flow-rates/
Čudina, Mirko"Noise of Axial Cooling Fans at Partial Flow Rates" Strojniški vestnik - Journal of Mechanical Engineering [Online], Volume 41 Number 5-6 (11 November 2017)

Authors

Affiliations

  • University of Ljubljana, Faculty of Mechanical Engineering, Slovenia

Paper's information

Strojniški vestnik - Journal of Mechanical Engineering 41(1995)5-6, 145-156

An axial cooling fan in an air-cooled diesel engine is one of the important noise sources. The main characteristics of axial flow fans are instabilities in their performance and noise characteristics at partial flow rate. The instabilities in fan operation are a consequence of rotating stalls created in the rotor blade and/or in guide vane cascade. The rotating stalls cause a steep increase in the emitted noise and lower the performances of the fan. At some operation conditions the rotating stalls also cause an appearance of surge. The surge points determine the surge line which represents the lowest region of fan operation. At given operation conditions and fan’s geometry, the surge line depends on the nature and intensity of the rotating stalls. In the available literature there are different explanations of the rotating stall generation and its influence on the emitted noise level and its spectra. The present paper highlights these phenomena using the theory of cascades and noise spectra analysis. Correlation between the discrete frequency of the non-rotational noise caused by the rotational stall and rotational frequency of the fan is also provided.

axial cooling; noise; fans; partial flow;