초록
A study of far wake characteristic of vertical wind turbines is necessary in order to sit them on a wind farm array. Most research has been conducted on flow measurements of near-wake in a vertical wind turbine, but very limited studies are found in far wake model. This study presents quantitative results of wind tunnel tests for far wake field of a Darrieus vertical axis wind turbine. Hot-wire anemometry was used to measure the distribution of mean velocity deficits and turbulence intensities, positioning it behind in distances between 2 and 12 times the diameter of the rotor. In comparison with horizontal axis wind turbine, velocity deficit and wake width of vertical axis wind turbines showed similar trend, and they set apart in two notable characteristics: drift of the lower peak velocity location and acceleration of wind velocity near the rotor.
키워드
수직축 풍력터빈, 풍동실험, 후류모델, 풍력단지, 풍속감소율
참고문헌(16)
-
[보고서] Renkema, D. J. / 2007 / Validation of wind turbine wake model using wind farm data and wind tunnel measurement
-
[학술지] Park, J. K. / 2015 / Cooperative wind turbine control for maximizing wind farm power using sequential convex programming / Energy Conversion and Management 101 : 295 ~ 316
-
[학술지] Dabiri, O. J. / 2011 / Potential order-of-magnitude enhancement of wind farm power density via counter-rotating vertical axis wind turbine arrays / Journal of Renewable and Sustainable Energy 3 (4) : 043104
-
[학술지] 정회갑 / 2014 / 소형 수직축 풍력발전기 풍동실험시 폐쇄율의 영향 / 한국태양에너지학회 논문집 34 (3) : 98 ~ 106
-
[기타] ASCE Standard / 1997 / Wind tunnel Testing for buildings and other structures
-
[학술지] DeVries, O. / 1983 / On the theory of the horizontal-axis wind turbine / Ann. Rev. Fluid Mech. 15 : 77 ~ 96
-
[학술지] Adaramola, M. S. / 2011 / Experimental investigation of wake effects on wind turbine performance / Renewable Energy 36 : 2078 ~ 2086
-
[학술지] Schümann, H. / 2013 / Experimental investigation of wind turbine wakes in the wind tunnel / Energy Procedia 35 : 285 ~ 296
-
[학술지] Chamorro, L. P. / 2012 / Reynolds number dependence of turbulence statistics in the wake of wind turbine / Wind Energy 15 : 733 ~ 742
-
[학술지] Bachant, P. / 2016 / Effects of Reynolds number on the energy conversion and near-wake dynamics of a high solidity vertical-axis cross-flow turbine / Energies 9 (2) : 73 ~ 90
-
[학술지] McTavish, S. / 2013 / Evaluating Reynolds number effects in small-scale wind turbine experiments / J. Wind Eng. Ind. Aerodyn. 120 : 81 ~ 90
-
[학술지] Okulov, V. L. / 2007 / Stability of helical tip vortices in a rotor far wake / Journal of Fluid Mechanics 576 : 1 ~ 25
-
[학술지] Chamorro, L. P. / 2011 / Turbulent flow inside and above a wind farm:A wind-tunnel study / Energies 146 (2) : 181 ~ 205
-
[학술지] Cal, R. B. / 2011 / Experimental study of the horizontally averaged flow structure in a model wind-turbine array boundary layer / Journal of Renewable and Sustainable Energy 2 (1) : 013106
-
[학술지] Schümann, H. / 2013 / Experimental investigation of wind turbine wakes in the wind tunnel / Energy Procedia 35 : 285 ~ 296
-
[학술지] Shamsoddin, S. / 2014 / Large eddy simulation of vertical axis wind turbine wakes / Energies 7 (2) : 890 ~ 912