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Experimental investigations of a full model with adaptive elasto-flexible membrane wings

Chinese Journal of Aeronautics 2021年第7期34卷 211-218页

作者： Jonathan PFLU ger Christian BrEITSAMTEr Chair of Aerodynamics and Fluid Mechanics Technical University of MunichGarching 85748Germany

The morphing wing concept aims to constantly adapt the aerodynamics to different flight *** wing is able to adapt to different flight conditions by an adjustable Aspect ratio(ar)and sweep.A high ar configuration provides high aerodynamic efficiency,while a low ar configuration,with highly swept wings offers a good ***,the flexible membrane allows the wing surface to stretch and contract in-plane as well as the airfoil to adapt to different aerodynamic *** the context of this work,the aerodynamic characteristics of a full model with form-adaptive elasto-flexible membrane wings are investigated *** focus is on the high-lift regime and on the analysis of the aerodynamic coefficients as well as their ***,the lateral aerodynamic derivatives at asymmetric wing positions are of interest.

关键词： Experimental aerodynamics Flexible wing surface Force and moment measurements Morphing wing Particle image velocimetry

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Himalayan Warming and Climate Change in India

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American Journal of Climate Change 2016年第4期5卷 558-574页

作者： Vadlamudi Brahmananda rao Sergio Henrique Franchito renato Orrú Pedroso gerólamo Emanuel Giarolla Surireddi Satyavenkata Venkata Siva ramakrishna Bodda ravi Srinivasa rao Chennu Vankateswara Naidu Center for Weather Prediction and Climate Studies INPE S?o José dos Campos S.P. Brazil Department of Meteorology and Oceanography Andhra University Visakhapatanam India

recent studies showed that the Himalayan glaciers are reducing alarmingly. This is attributed to global warming. Since the melt water of Himalayan glaciers and snow is the principal source of water for several rivers, a decrease of this source is a calamity for the large fraction of global population living in nearby regions such as India. In Asia for the 60% global population only 36% of global water is available. Any further decrease of this vital necessity makes the very existence of billions of people doubtful. Here we show, using both observations and one IPCC-ar4 model with high horizontal resolution, that the Himalayan region in fact underwent a maximum warming of 2.5°C from 1950 to 1999 and would reach the highest temperature rise of 9°C in 2100. Temperature and rainfall variations determine a simple climate classification proposed by Köppen. We show changes that occur in climate and biosphere using this classification. Also we discussed the impact of warming and resulting changes in Köppen climates on the floods and malaria in India.

关键词： Himalayan Glaciers Global Warming Floods in India Malaria in India IPCC ar4 Model Köppen Climates

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