Flow field in a low-speed axial fan: a DPIV investigation

Estevadeordal, Jordi; Gogineni, Sivaram; Copenhaver, William W.; Bloch, Gregor; Brendel, Michael

doi:10.1016/s0894-1777(00)00027-3

Cited by 31 publications

(11 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Even at the most efficient angle of attack, significant boundary layer separations are observed on thick profiles-of relative thickness above 10%-while not on thin profiles [11] and the lift is reduced. The viscous dissipation is moreover greater for thick profiles, especially when they have rounded trailing edge as it is the case here [10]. Despite these drawbacks, the thick profiles have the advantage of having a more progressive stall than thin profiles, at higher angles of attack.…”

Section: Remarks and Discussion On The Modifications Of Overall Perfomentioning

confidence: 77%

“…Applied to low-speed axial-flow fans, one could a priori think that the extra thickness may increase the dissipation of energy in the von Kármán street behind the blades so that the performances of the fan decrease and the pressure fluctuations in its wake increase. The effects of blade thickness on the overall performances are not so well known [9][10][11][12] and to the best of our knowledge the influence on the dynamics remains an open question.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental study of blade thickness effects on the overall and local performances of a Controlled Vortex Designed axial-flow fan

Sarraf

Nouri

Ravelet

et al. 2011

Experimental Thermal and Fluid Science

View full text Add to dashboard Cite

Section: Remarks and Discussion On The Modifications Of Overall Perfomentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Experimental study of blade thickness effects on the overall and local performances of a Controlled Vortex Designed axial-flow fan

Sarraf

Nouri

Ravelet

et al. 2011

Experimental Thermal and Fluid Science

View full text Add to dashboard Cite

“…Estevadeordal등 [5] 은 DPIV를 사용하여 저속으로 회전 하는 축류팬의 유동특성을 연구하였다. Lee 등 [6] 은 전 향스윕된 축류팬에서 팁 볼텍스의 특성을 3차원 LDV 와 수치해석을 적용하여 유동특성을 연구하였다.…”

Section: 서 론unclassified

Experimental Study on Air Flow Characteristics of Axial Dual-blade Fan

Kim¹,

Lee²

2014

Journal of the Korean Society of Manufacturing Process Engineer

View full text Add to dashboard Cite

To ventilate indoor spaces, axial single-blade fans are widely used in various areas, such as schools, houses, offices, and restaurants. Recently, axial single-blade fans were developed to realize energy efficiency and noise reduction improvements. Here, an experimental study of the air flow characteristics of an axial dual-blade fan is conducted. The characteristics of the axial dual-blade fan were tested via an air flow analysis and with prototypes. For the performance of the fan, the flow rate, power consumption, and noise were evaluated. The result showed that the axial dual-blade fan uses less power and produces less noise in comparison with an axial single-blade fan.

show abstract

“…For examples, with a counting system detecting the rotor blade position, Ottavy et al reconstructed the velocity fields underthe various rotor-stator relative locationsfor high speed compressors [12]. Estevadeordal et al reproduced the flow fields at the certain rotor locations in a low speed axial fanwith a measurement system synchronized to the blade position [13].…”

Section: 1measurement Systemmentioning

confidence: 99%

“…Fixing the measurement systems in the stationary frame, numerous researchers established the ensemble averaged distribution of specific flow characteristics inside the rotating machinery by measuring synchronized to the rotation of rotor blades [12,13]. Compared with thetraditional rotor-stator combinationsin their studies where only two frames (one stationary and single rotating frame) exist, the contra-rotating rotors (requiredone stationary and two rotating framesto be considered) appear rather complicated to be tracked during experiment.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Blade-To-Blade Pressure Distribution in Contra-Rotating Axial Flow Pump

Cao

Watanabe

Honda

et al. 2014

International Journal of Fluid Machinery and Systems

View full text Add to dashboard Cite

As a high specific speed pump, the contra-rotating axial flow pump with two rotors rotating reversely has been proved with higher hydraulic and cavitation performance, while in our previous researches, the potential interaction between two blade rows was distinctly observed for our prototype rotors designed with equal rotational speed for both front and rear rotors. Based on the theoretical and experimental evidences, a rotational speed optimization methodology was proposed and applied in the design of a new combination of contra-rotating rotors, primarily in expectation of the optimized blade pressure distributions as well as pertinently improved hydraulic performances including cavitation performance. In the present study, given one stationary and two rotating frames in the contra-rotating rotors case, a pressure measurement concept taking account of the revolutions of both front and rear rotors simultaneously was adopted. The casing wall pressure data sampled in time domain was successfully transferred into space domain, by which the ensemble averaged blade-to-blade pressure distributions at the blade tip of two contra-rotating rotors under different operation conditions were studied. It could be seen that the rotor pair with the optimized rotational speed combination as well as work division, shows more reasonable blade-to-blade pressure distribution and well weakened potential interaction. Moreover, combining the loading curves estimated by the measured casing wall pressure, the cavitation performance of the rotor pairs with new rotational speed combination were proved to be superior to those of the prototype pairs.

show abstract

Flow field in a low-speed axial fan: a DPIV investigation

Cited by 31 publications

References 6 publications

Experimental study of blade thickness effects on the overall and local performances of a Controlled Vortex Designed axial-flow fan

Experimental study of blade thickness effects on the overall and local performances of a Controlled Vortex Designed axial-flow fan

Experimental Study on Air Flow Characteristics of Axial Dual-blade Fan

Experimental Investigation of Blade-To-Blade Pressure Distribution in Contra-Rotating Axial Flow Pump

Contact Info

Product

Resources

About