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Author

Srinivasan Raghunathan

Other affiliations: Queen's University
Bio: Srinivasan Raghunathan is an academic researcher from Queen's University Belfast. The author has contributed to research in topics: Transonic & Boundary layer. The author has an hindex of 26, co-authored 207 publications receiving 2608 citations. Previous affiliations of Srinivasan Raghunathan include Queen's University.


Papers
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TL;DR: In this article, the performance of a single plane biplane Wells turbine with or without guide vanes is compared with a wave energy device based on the principle of the oscillating water-air column.

286 citations

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TL;DR: The cost definitions are reviewed in the context of the nature of cost as applicable to the engineering process stages: from bidding through to design, to manufacture, to procurement and ultimately, to operation.

238 citations

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TL;DR: In this paper, a review of passive control shock boundary layer control in transonic flow is presented, showing that passive control can reduce drag, increase lift and reduce unsteady pressures on an aerofoil.

161 citations

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TL;DR: The paper will review the current state of art in SE approach to aircraft design and identify some of the major challenges, theCurrent state of the art and visions for the future.

102 citations

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TL;DR: A review of the state-of-the-art of the equations used to predict the time-averaged axial, tangential and radial components of velocity within the zone of flow establishment and the zones of established flow of a ship's propeller jet can be found in this paper.

61 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, the development of wave energy utilization since the 1970s is discussed, with a focus on the characterization of the wave energy resource; theoretical background, with especial relevance to hydrodynamics of wave absorption and control; how a large range of devices kept being proposed and studied, and how such devices can be organized into classes; the conception, design, model-testing, construction and deployment into real sea of prototypes.
Abstract: Sea wave energy is being increasingly regarded in many countries as a major and promising resource. The paper deals with the development of wave energy utilization since the 1970s. Several topics are addressed: the characterization of the wave energy resource; theoretical background, with especial relevance to hydrodynamics of wave energy absorption and control; how a large range of devices kept being proposed and studied, and how such devices can be organized into classes; the conception, design, model-testing, construction and deployment into real sea of prototypes; and the development of specific equipment (air and water turbines, high-pressure hydraulics, linear electrical generators) and mooring systems.

2,115 citations

Journal ArticleDOI
TL;DR: A comprehensive review of wave energy converters and air turbines can be found in this paper, together with a survey of theoretical, numerical and experimental modelling techniques of OWC converters.

594 citations

Posted Content
01 Jan 2010
TL;DR: The authors presented a model and method for isolating managerial intuition in cross-validated model analyses, and found that a combination of model and manager always outperforms either of these decision inputs in isolation, an average R2 increase of 0.09 (16%) above the best single decision input in crossvalidation model analyses.
Abstract: We focus on ways of combining simple database models with managerial intuition. We present a model and method for isolating managerial intuition. For five different business forecasting situations, our results indicate that a combination of model and manager always outperforms either of these decision inputs in isolation, an average R2 increase of 0.09 (16%) above the best single decision input in cross-validated model analyses. We assess the validity of an equal weighting heuristic, 50% model + 50% manager, and then discuss why our results might differ from previous research on expert judgment.

400 citations

Journal ArticleDOI
TL;DR: In this article, the authors reviewed the effect of facility noise on the trend in transition Reynolds numbers in conventional ground-test facilities, of both conventional and quiet design, at hypersonic and high supersonic speeds.
Abstract: It is well known that the high levels of noise present in conventional hypersonic ground-test facilities cause transition to occur earlier than in e ight. Flight measurements of incoming noise are reviewed and compared with measurements in ground-test facilities, of both conventional and quiet design, at hypersonic and high supersonic speeds. The low noise present in e ight is apparently the reason for the very large transition Reynolds numbers sometimes measured in e ight, when roughness, crosse ow, and other factors are controlled. Design will usually involve consideration of the trend in transition when a parameter is varied. The effect of facility noise on these trends is reviewed. In some cases, the trend of conventional-tunnel data is opposite to the trend in quiet-tunnel data. Thus, transition measurements in conventional ground-test facilities are not reliable predictors of e ight performance, except perhaps in special cases.

344 citations

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TL;DR: In this article, a review of the physical mechanisms of the periodic shock motion on airfoils at transonic flow conditions are associated with the phenomenon of buffeting, and various modes of shock wave motion for different flow conditions and airfoil configurations are described.

333 citations