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Experimental Analysis of A Cooling System for wind-driven Generator Stator

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Transactions of Nanjing University of Aeronautics and Astronautics 2016年第2期33卷 180-186页

作者： Qian Xiaohui Jiang Yanlong Cheng Danfeng Liu Juan College of Aerospace Engineering Nanjing University of Aeronautics & Astronautics Shanghai Aircraft Design & Research Institute Commercial Aircraft Corporation of ChinaLtd

A novel cooling system with cooling channels is proposed for the stator of 3MW wind-driven *** experimental platform is built to investigate the performance of the cooling system with different ***30%,50% or 80% generator loads,the temperatures meet the design ***,it is a little over the requirement at 100%load,duo to experimental errors and some unknown thermal *** the test at 100%load,the developing trends of the parameters of these two generators are similar and only minor differences occurs when they reach steady state our work can be benefit for the design and improvement of MW wind-driven generator cooling solutions.

关键词： wind-driven generator stator cooling channels cooling method, experimental study

Analysis on observing optimization for the wind-driven circulation by an adjoint approach

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Science China Earth Sciences 2000年第3期43卷 243-252页

作者：王东晓吴国雄朱江兰健 State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG) Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100080 China Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Institute of Physical Oceanography Ocean University of Qingdao Qingdao 266003 China

The adjoint approach is a variational method which is often applied to data assimilation widely in meteorology and oceanography. It is used for analyses on observing optimization for the wind-driven Sverdrup circulation. The adjoint system developed by Thacker and Long (1992), which is based on the GFDL Byran-Cox model, includes three components, i. e. the forward model, the adjoint model and the optimal algorithm. The GFDL Byran-Cox model was integrated for a long time driven by a batch of ideal wind stresses whose meridional component is set to null and zonal component is a sine function of latitudes in a rectangle box with six vertical levels and 2 by 2 degree horizontal resolution. The results are regarded as a 'real' representative of the wind-driven Sverdrup circulation, from which the four dimensional fields are allowed to be sampled in several ways, such as sampling at the different levels or along the different vertical sections. To set the different samples, the fields of temperature,

关键词： adjoint data assimilation observing optimization wind-driven circulation.

NUMERICAL MODELLING OF THREE-DIMENSION CHARACTERISTICS OF wind-driven CURRENT IN THE BOHAI SEA

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Chinese Journal of Oceanology and Limnology 1993年第1期11卷 70-79页

作者：赵进平侍茂崇 Institute of Oceanology Academia Sinica Qingdao 266071 Ocean University of Qingdao Qingdao 266003

Three- dimension (3-D) wind-driven currents in the Bohai Sea in both winter and summer are calculated by using a 3- D barotropic steady model, and the results are consistent with observed flow char -acteristics. Based on the results, 3- D characteristics of flow, currents at different depths, compensated flow in the lower layer , long and narrow alongshore current, the area of upwelling and downwelling, main circulation in vertical profile, and the current in Bohai Strait are discussed.

关键词： the Bohai Sea- 3-dimension model numerical study wind-driven current

wind-driven Slanting Profile Wave Derived from the Unified Variational Principle of Water Gravity Wave

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Marine Science Bulletin 1999年第2期1卷 36-44页

作者： Fu Yuhua(China Offshore Oil Production Research Center)

Considering that at present the regular waves in common use have the profile symmetrized to a vertical axis, which are different from actual wind-driven sea waves, and based on deriving linear wave, solitary wave, fifth order Stokes wave and stream function wave by using Unified Variational Principle of Water Gravity Wave (UVPWGW), this paper derives wind-driven slanting profile wave by using UVPWGW. Its feature is that under the action of wind pressure, the wave profile is not symmetrized to a vertical axis, but that it is in the forward slanting form.

关键词： unified variational principle of water gravity wave wind-driven wave slanting profile

Triboelectrification based on double-layered polyaniline nanofibers for self-powered cathodic protection driven by wind

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Nano Research 2018年第4期11卷 1873-1882页

作者： Siwen Cui Youbin Zheng Jun Liang Daoai Wang State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China University of Chinese Academy of Sciences Beijing 100049 China

Polyaniline nanofibers （PANI NFs） are introduced to construct a wind-driven triboelectric nanogenerator （TENG） as a new power source for self-powered cathodic protection. PANI NFs serve as a friction layer to generate charges by harvesting wind energy as well as a conducting layer to transfer charges in TENG. A PANI NFs-based TENG exhibits a high output performance with a maximum output voltage of 375 V, short current circuit of 248 μA, and corresponding power of 14.5 mW under a wind speed of 15 m/s. Additionally, a self-powered anticorrosion system is constructed by using a PANI-based TENG as the power source. The immersion experiment and electrochemical measurements demonstrate that carbon steel coupled with the wind-driven TENG is effectively protected with an evident open circuit potential drop and negative shift in the corrosion potential. The smart self-powered device is promising in terms of applications to protect metals from corrosion by utilizing wind energy in ambient conditions.

关键词： polyaniline triboelectric nanogenerator wind-driven self-powered cathodic protection

DYNAMIC MODEL FOR OIL SLICK DISPERSION INTO A WATER COLUMN- A winddriven WAVETANK EXPERIMENT

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维普期刊数据库

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Chinese Journal of Oceanology and Limnology 1993年第2期11卷 161-170页

作者：陆贤崑李静陈淑珠 Department of Marine Chemistry Ocean University of Qingdao Qingdao 266003

A dynamic experiment for oil dispersion into a water column was performed with a 21 m long, 0.5 m wide, and 1 m high wind-driven wave tank. At wind velocity between 6-12 m/s and with the oil slide kept constant (about 1 um), the rate of the oil content increase in the water column could be approximated from the difference between the dispersion rate (R) of the oil slick and the coagulation rate (R’) of the dispersed oil slick. Assuming the coagulation rate is directly proportional to the concentration of the water dispersed oil slick (i. e. R’ =KC),, the integral form of the dynamic model can be expressed as C=R*[1-exp(-K*t)]/K and parameters R and K can be regressed with a computer. The relative deviation of model results from the experimental data was mainly less than 10%. The oil slick dispersion rate (R) had exponential relationship with the wind velocity (V), and can be fitted with a formula R=A*(U+1)*** fitted constant of the coagulation rate, K(0.8-3.0* 10-3 min-1) did not have significant

关键词： dynamic model oil slick dispersion wind-driven wave tank

Numerical study of hydrodynamic process in Chaohu Lake

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Journal of Hydrodynamics 2015年第5期27卷 720-729页

作者：陈苑盈刘青泉 Laboratory for Mechanics in Fluid Solid Coupling System Institute of Mechanics Chinese Academy of Sciences

In this paper, the hydrodynamic characteristics of water flow in Chaohu Lake are studied by using the finite volume coastal ocean model（FVCOM）, which is verified by the observed data. The typical flow field and the 3-D flow structure are obtained for the lake. The flow fields under extreme conditions are analyzed to provide a prospective knowledge of the water exchange and the transport *** influence of the wind on the flow is determined by the cross spectrum method. The results show that the wind-driven flow dominates most area of the lake. Under prevailing winds in summer and winter, the water flows towards the downwind side at the upper layer while towards the upwind side at the lower layer in most area except that around the Chaohu Sluice. The extreme wind speed is not favorable for the water exchange while the sluice＇s releasing water accelerates the process. The water velocity in the lake is closely related with the wind speed.

关键词： Chaohu Lake FVCOM flow field wind-driven extreme situation flow's response

Weather induced subtidal flows through multiple inlets of an arctic microtidal lagoon

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Acta Oceanologica Sinica 2019年第3期38卷 1-16页

作者： Chunyan Li Kevin M.Boswell Nazanin Chaichitehrani Wei Huang Renhao Wu Department of Oceanography and Coastal Sciences College of the Coast and Environment Louisiana State University Department of Biological Sciences Florida International University Horn Point Laboratory Center for Environmental Science University of Maryland College of Marine Sciences and Technology Zhejiang Ocean University

Estuarine processes in the arctic lagoons are among the least studied but important subjects, especially considering the rapid warming of arctic water which may change the length of ice-free period in the summer. In this paper, wind-driven exchange flows in the micro-tidal Elson Lagoon of northern Alaska with multiple inlets of contrasting widths and depths are studied with in situ observations, statistical analysis, numerical experiments, a regression model on the basis of dynamics, and remote sensing data. Water velocity profiles were obtained from a bottom deployed acoustic Doppler current profiler(ADCP) in the northwestern Eluitkak Pass connecting the Beaufort Sea to the Elson Lagoon during a 4.9 day ice-free period in the summer of 2013. The subtidal flow is found correlated with wind(R^2 value ～96%). Frequently occurring east, northeast and north winds from the arctic atmospheric high-and low-pressure systems push water from the Beaufort Sea into the lagoon through the wide inlets on the eastern side of the lagoon, resulting in an outward flow against the wind at the narrow northwestern inlet. The counter-wind flow is a result of an uneven wind forcing acting through the asymmetric inlets and depth,an effect of "torque" or vorticity. Under northwest wind, the exchange flow at the northwestern inlet reverses its direction, with inward flows through the upwind northwestern inlet and outward flows through the downwind eastern inlets. A regression model is established based on the momentum equations and Taylor series expansions. The model is used to predict flows in July and August of 2015 and July of 2017, supported by available Landsat satellite images. About 73%–80% of the time the flows at Eluitkak Pass are out of Elson Lagoon for the summer of 2015 and 2017. Numerical experiments are conducted to corroborate the findings and illustrate the effects under various wind conditions. A quasi-steady state balance between wind force and surface pressure gradient is c

关键词： wind-driven flows multiple inlets micro-tidal numerical model experiments counter-wind flows quasi-steady state

OUTFLOW OF SUSPENDED MATERIALS FROM THE CHANGJIANG RIVER MOUTH

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Chinese Journal of Oceanology and Limnology 1997年第3期15卷 258-263页

作者：彭马川胡敦欣 Institute of Oceanology Chinese Academy of Sciences Qingdao 266071

Typical wind fields in winter and summer were applied in a three-dimensional model for simulating the wind-driven current fields in the study region 27.0 °N to 34.5°N, 120.0°E to 126.0°E. Deta from three cruises in 1993 and 1994 were analyzed to obtain the horizontal and vertical structures of total suspended matter (TSM) there. Based on this study, a numerical method was derived to show that it is in winter, not summer, that the suspended matter (SM) is catrried out from the mouth of the Changjiang River to the deep ocean, and yield some other important conclusions.

关键词： numerical model wind-driven current fields flux suspended matter