Flow Unsteadiness and Pressure Pulsations in a Nuclear Reactor Coolant Pump

NI, Dan ;YANG, Minguan ;GAO, Bo ;ZHANG, Ning ;LI, Zhong .
Flow Unsteadiness and Pressure Pulsations in a Nuclear Reactor Coolant Pump. 
Strojniški vestnik - Journal of Mechanical Engineering, [S.l.], v. 62, n.4, p. 231-242, june 2018. 
ISSN 0039-2480.
Available at: <https://www.sv-jme.eu/article/flow-unsteadiness-and-pressure-pulsations-in-a-nuclear-reactor-coolant-pump/>. Date accessed: 26 apr. 2024. 
doi:http://dx.doi.org/10.5545/sv-jme.2015.3192.

Ni, D., Yang, M., Gao, B., Zhang, N., & Li, Z.
(2016).
Flow Unsteadiness and Pressure Pulsations in a Nuclear Reactor Coolant Pump.
Strojniški vestnik - Journal of Mechanical Engineering, 62(4), 231-242.
doi:http://dx.doi.org/10.5545/sv-jme.2015.3192

@article{sv-jmesv-jme.2015.3192,
	author = {Dan  Ni and Minguan  Yang and Bo  Gao and Ning  Zhang and Zhong  Li},
	title = {Flow Unsteadiness and Pressure Pulsations in a Nuclear Reactor Coolant Pump},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {62},
	number = {4},
	year = {2016},
	keywords = {nuclear reactor coolant pump;flow unsteadiness;pressure pulsation;vorticity magnitude},
	abstract = {Unsteady flow induced by rotor-stator interaction is detrimental to the safe operation of the nuclear reactor coolant pump, so it is essential to clarify flow structures and pressure pulsation in such pumps, especially within the spherical casing. In this paper, unsteady flow characteristics in a mixed-flow nuclear reactor coolant model pump were investigated using large-eddy simulation (LES) method. Results show that at the nominal flow rate, in two particular diffuser channels near the spherical casing discharge nozzle, the flow structures are uneven compared with that in the other flow channels. The reason is associated with the position of the flow channel with respect to the spherical casing nozzle. Large- scale flow separation and backflow structures easily occur at the regions near these two channels. In the right and the middle region of the casing nozzle, due to the large-scale separate flow and high vorticity magnitude, unsteady flow structures are more complicated in comparison with the other regions. It has been found that the vorticity spectra and the pressure spectra almost have the same main excitation frequencies. Therefore, it has been confirmed that for particular regions pressure pulsations are determined by the shedding vortex wake from the diffuser blade trailing edge of the nuclear reactor coolant model pump.},
	issn = {0039-2480},	pages = {231-242},	doi = {10.5545/sv-jme.2015.3192},
	url = {https://www.sv-jme.eu/article/flow-unsteadiness-and-pressure-pulsations-in-a-nuclear-reactor-coolant-pump/}
}

Ni, D.,Yang, M.,Gao, B.,Zhang, N.,Li, Z.
2016 June 62. Flow Unsteadiness and Pressure Pulsations in a Nuclear Reactor Coolant Pump. Strojniški vestnik - Journal of Mechanical Engineering. [Online] 62:4

%A Ni, Dan 
%A Yang, Minguan 
%A Gao, Bo 
%A Zhang, Ning 
%A Li, Zhong 
%D 2016
%T Flow Unsteadiness and Pressure Pulsations in a Nuclear Reactor Coolant Pump
%B 2016
%9 nuclear reactor coolant pump;flow unsteadiness;pressure pulsation;vorticity magnitude
%! Flow Unsteadiness and Pressure Pulsations in a Nuclear Reactor Coolant Pump
%K nuclear reactor coolant pump;flow unsteadiness;pressure pulsation;vorticity magnitude
%X Unsteady flow induced by rotor-stator interaction is detrimental to the safe operation of the nuclear reactor coolant pump, so it is essential to clarify flow structures and pressure pulsation in such pumps, especially within the spherical casing. In this paper, unsteady flow characteristics in a mixed-flow nuclear reactor coolant model pump were investigated using large-eddy simulation (LES) method. Results show that at the nominal flow rate, in two particular diffuser channels near the spherical casing discharge nozzle, the flow structures are uneven compared with that in the other flow channels. The reason is associated with the position of the flow channel with respect to the spherical casing nozzle. Large- scale flow separation and backflow structures easily occur at the regions near these two channels. In the right and the middle region of the casing nozzle, due to the large-scale separate flow and high vorticity magnitude, unsteady flow structures are more complicated in comparison with the other regions. It has been found that the vorticity spectra and the pressure spectra almost have the same main excitation frequencies. Therefore, it has been confirmed that for particular regions pressure pulsations are determined by the shedding vortex wake from the diffuser blade trailing edge of the nuclear reactor coolant model pump.
%U https://www.sv-jme.eu/article/flow-unsteadiness-and-pressure-pulsations-in-a-nuclear-reactor-coolant-pump/
%0 Journal Article
%R 10.5545/sv-jme.2015.3192
%& 231
%P 12
%J Strojniški vestnik - Journal of Mechanical Engineering
%V 62
%N 4
%@ 0039-2480
%8 2018-06-27
%7 2018-06-27

Ni, Dan, Minguan  Yang, Bo  Gao, Ning  Zhang, & Zhong  Li.
"Flow Unsteadiness and Pressure Pulsations in a Nuclear Reactor Coolant Pump." Strojniški vestnik - Journal of Mechanical Engineering [Online], 62.4 (2016): 231-242. Web.  26 Apr. 2024

TY  - JOUR
AU  - Ni, Dan 
AU  - Yang, Minguan 
AU  - Gao, Bo 
AU  - Zhang, Ning 
AU  - Li, Zhong 
PY  - 2016
TI  - Flow Unsteadiness and Pressure Pulsations in a Nuclear Reactor Coolant Pump
JF  - Strojniški vestnik - Journal of Mechanical Engineering
DO  - 10.5545/sv-jme.2015.3192
KW  - nuclear reactor coolant pump;flow unsteadiness;pressure pulsation;vorticity magnitude
N2  - Unsteady flow induced by rotor-stator interaction is detrimental to the safe operation of the nuclear reactor coolant pump, so it is essential to clarify flow structures and pressure pulsation in such pumps, especially within the spherical casing. In this paper, unsteady flow characteristics in a mixed-flow nuclear reactor coolant model pump were investigated using large-eddy simulation (LES) method. Results show that at the nominal flow rate, in two particular diffuser channels near the spherical casing discharge nozzle, the flow structures are uneven compared with that in the other flow channels. The reason is associated with the position of the flow channel with respect to the spherical casing nozzle. Large- scale flow separation and backflow structures easily occur at the regions near these two channels. In the right and the middle region of the casing nozzle, due to the large-scale separate flow and high vorticity magnitude, unsteady flow structures are more complicated in comparison with the other regions. It has been found that the vorticity spectra and the pressure spectra almost have the same main excitation frequencies. Therefore, it has been confirmed that for particular regions pressure pulsations are determined by the shedding vortex wake from the diffuser blade trailing edge of the nuclear reactor coolant model pump.
UR  - https://www.sv-jme.eu/article/flow-unsteadiness-and-pressure-pulsations-in-a-nuclear-reactor-coolant-pump/

@article{{sv-jme}{sv-jme.2015.3192},
	author = {Ni, D., Yang, M., Gao, B., Zhang, N., Li, Z.},
	title = {Flow Unsteadiness and Pressure Pulsations in a Nuclear Reactor Coolant Pump},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {62},
	number = {4},
	year = {2016},
	doi = {10.5545/sv-jme.2015.3192},
	url = {https://www.sv-jme.eu/article/flow-unsteadiness-and-pressure-pulsations-in-a-nuclear-reactor-coolant-pump/}
}

TY  - JOUR
AU  - Ni, Dan 
AU  - Yang, Minguan 
AU  - Gao, Bo 
AU  - Zhang, Ning 
AU  - Li, Zhong 
PY  - 2018/06/27
TI  - Flow Unsteadiness and Pressure Pulsations in a Nuclear Reactor Coolant Pump
JF  - Strojniški vestnik - Journal of Mechanical Engineering; Vol 62, No 4 (2016): Strojniški vestnik - Journal of Mechanical Engineering
DO  - 10.5545/sv-jme.2015.3192
KW  - nuclear reactor coolant pump,flow unsteadiness,pressure pulsation,vorticity magnitude
N2  - Unsteady flow induced by rotor-stator interaction is detrimental to the safe operation of the nuclear reactor coolant pump, so it is essential to clarify flow structures and pressure pulsation in such pumps, especially within the spherical casing. In this paper, unsteady flow characteristics in a mixed-flow nuclear reactor coolant model pump were investigated using large-eddy simulation (LES) method. Results show that at the nominal flow rate, in two particular diffuser channels near the spherical casing discharge nozzle, the flow structures are uneven compared with that in the other flow channels. The reason is associated with the position of the flow channel with respect to the spherical casing nozzle. Large- scale flow separation and backflow structures easily occur at the regions near these two channels. In the right and the middle region of the casing nozzle, due to the large-scale separate flow and high vorticity magnitude, unsteady flow structures are more complicated in comparison with the other regions. It has been found that the vorticity spectra and the pressure spectra almost have the same main excitation frequencies. Therefore, it has been confirmed that for particular regions pressure pulsations are determined by the shedding vortex wake from the diffuser blade trailing edge of the nuclear reactor coolant model pump.
UR  - https://www.sv-jme.eu/article/flow-unsteadiness-and-pressure-pulsations-in-a-nuclear-reactor-coolant-pump/

Ni, Dan, Yang, Minguan, Gao, Bo, Zhang, Ning, AND Li, Zhong.
"Flow Unsteadiness and Pressure Pulsations in a Nuclear Reactor Coolant Pump" Strojniški vestnik - Journal of Mechanical Engineering [Online], Volume 62 Number 4 (27 June 2018)