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Efficient Energy Performance within Smart Grid

Smart Grid and Renewable Energy 2017年第3期8卷 75-86页

作者： Khizer Ayaz muhammad sohail sulemani Naseer Ahmed Department of Electrical Engineering CIIT Abbottabad Pakistan

The Smart Grid, regarded as the next generation power grid, uses two-way flows of electricity and information to create a widely distributed automated energy delivery network. Energy/power plays a critical role for social, economic and industrial development. Because of industrial generalization, especially in agricultural and economical activities, the energy demand has increased rapidly in developed countries. Generation and usage of energy has direct impact on modern power grid. In this scenario energy management is a hard task because load is dynamic and we don’t have control over it. Renewable or undepleted energy resources have great applications and impact in current electric power system situation. For example it gives pollution free (green) energy which is environment and user friendly. It is cost effective;it uses natural resources for its generation and hence do not waste any coal, gas etc. There are many inducements to empower energy productivity. As current smart grid is complex and non linear in operation and design, it used an optimized method that provides maximum efficiency with minimum input. Our work depicts a case study of hybrid electric aircraft for achieving high performance.

关键词： Smart Grid (SG) Demand Response (DR) Renewable Energy Distributed Generators (DG)

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Vortex-Induced Vibrations of Two Cylinders in Tandem Arrangement at Low Reynolds Number

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Open Journal of Fluid Dynamics 2023年第S1期13卷 262-273页

作者： Joseph sulemani Mloy Yan Wang College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics Nanjing China

The objective of this study is to apply numerical methods to investigate the effects of the spacing on the vortex shedding of two elastically mounted cylinders in tandem arrangement. 2-D computational simulations are carried out at low Reynolds number of 100. The study utilized a commercial software ANSYS FLUENT to carry out the computational simulations. First, a number of test cases, including flows past one and two cylinders with predetermined motions, are simulated to evaluate the solver’s accuracy. The vortex shedding and hydrodynamic forces from the current findings and those from literature show good agreement, which supports the accuracy of the current solver. Multiple simulations were the performed for flow around two elastically mounted cylinders in tandem arrangement. The subsequent relative flow fields demonstrated that for a certain range of spacing, vortex shedding was completely eliminated while it remained completely unaffected or partially reduced for other ranges of spacing. This suggests that the spacing between the two cylinders can be utilized as a passive method of suppressing vortex shedding.

关键词： Vortex Shedding Elastically Mounted Cylinders Tandem Reynolds Number

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