ConferenceAIAA Scitech Forum and Exposition 2024 · January 1, 2024
A uniform stress distribution can improve the aeroelastic flight envelope of flying wing aircraft through the structure. We investigate the effect of spar and rib design on a flying wing aircraft’s stress distribution and aeroelastic behavior. We apply the ...
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ConferenceAIAA Science and Technology Forum and Exposition AIAA Scitech Forum 2022 · January 1, 2022
The aeroelastic flight envelops of flying wing aircraft can be extended with a better flow of stresses in the structure. In the present study, we investigate the effect of cross-section configuration on the stress distribution and aeroelastic behavior of a ...
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ConferenceASME International Mechanical Engineering Congress and Exposition Proceedings Imece · January 1, 2022
The purpose of this paper is to examine how rib configurations and spar configurations influence flying wing stability. Flying wing aircraft exhibit enhanced flutter characteristics when stresses flow smoothly through the wing. We prevent stress strangulat ...
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ConferenceInternational Exchange and Innovation Conference on Engineering and Sciences · January 1, 2022
Porous materials are usually thought of as amorphous mixtures of two or more things, solids, fluids, and voids. The research field started that way, and so did my own activity in it. Along the way, I was drawn to the part of nature (the physics) that was m ...
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ConferenceAIAA Scitech 2019 Forum · January 1, 2019
A high-aspect ratio aircraft exhibits primarily a nonlinear aeroelastic behavior, and a change in the geometric features of the structure could drastically alter the aeroelastic stability of the system. Here, we show how a certain design parameter would in ...
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ConferenceASME International Mechanical Engineering Congress and Exposition Proceedings Imece · January 1, 2016
In this paper, a novel geometry is proposed for evaporators that are used in Organic Rankine Cycles. The proposed geometry consists of employing successive plenums at several lengthscale levels, creating a multi-scale heat exchanger. The channels at the lo ...
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ConferenceASME International Mechanical Engineering Congress and Exposition Proceedings Imece · January 1, 2016
In this paper we report the main advances made by our research group on the heat transfer performance of complex stream architectures embedded in a conducting solid. The immediate application of this review work deals with groundcoupled heat pumps. Various ...
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ConferenceASME International Mechanical Engineering Congress and Exposition Proceedings Imece · January 1, 2007
In this paper we describe a new concept for vascularizing the flow architectures of compact devices. Vascularization is achieved by using tree-shaped (dendritic) flow passages on both sides of the heat transfer surface. For each side, we propose to use an ...
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ConferenceInternational Heat Transfer Conference · January 1, 2006
This paper reports on the geometric optimization of a heat-sink cooling channel where the objective is to maximize the global thermal conductance of the heat-sink and the coolant channel, subject to two global constraints: fixed total volume and solid mate ...
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ConferenceInternational Heat Transfer Conference · January 1, 2006
In this paper, an elemental T shaped unit of a constructal network has been optimized. The effects of junction losses and surface roughness on the optimal shape of fluid flow passages are considered. It is shown that the effect of the junction losses on th ...
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ConferenceInternational Heat Transfer Conference · January 1, 2006
Natural porous structures are heterogeneous, with multiple scales that are distributed nonuniformly. Few large pores (fissures, channels, cracks) are accompanied by numerous finer channels. Can this type of flow architecture be attributed to a principle of ...
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ConferenceECOS 2006 Proceedings of the 19th International Conference on Efficiency Cost Optimization Simulation and Environmental Impact of Energy Systems · January 1, 2006
This paper develops analytically the optimal sizes (hydraulic diameters) of parallel channels that penetrate and cool a volume with uniformly distributed internal heat generation. The coolant is single phase, and the flow is laminar. The total volume and t ...
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ConferenceASME International Mechanical Engineering Congress and Exposition Proceedings Imece · January 1, 1999
This paper outlines a newly emerging body of work that relies on exergy analysis and thermodynamic optimization in the design of energy systems for modem aircraft. Exergy analysis establishes the theoretical performance limit. The minimization of exergy de ...
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ConferenceInternational Heat Transfer Conference · January 1, 1998
This keynote paper reviews a" modern transformation in heat transfer: the increasingly important roles played by thermodynamics principles and design considerations in problem formulation. Thermodynamic optimization, or entropy generation minimization is t ...
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ConferenceASME International Mechanical Engineering Congress and Exposition Proceedings Imece · January 1, 1997
This paper outlines a series of recent developments that provide a theoretical basis for the formation of shape and structure in nonequilibrium (flow) systems subjected to overall constraints. It is shown that geometrical form can be deduced from a single ...
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ConferenceAmerican Society of Mechanical Engineers Paper · January 1, 1976
Forced-cooled superconductors are viewed as a promising alternative in the development of high field superconducting magnets for future fusion devices. The high current density cabled superconductor is protected against thermal instabilities by forcing (si ...
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