Aerothermodynamic shape optimization of hypersonic blunt bodies

Eyi, Sinan; Yumusak, Mine

doi:10.1080/0305215x.2014.933822

Cited by 16 publications

(5 citation statements)

References 23 publications

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“…Specific impulse is a performance of propulsion system. It describes the available thrust per fuel mass flowrate, as shown in (32). To satisfy a given thrust requirement, a propulsion system with higher specific impulse would consumes less fuel.…”

Section: Subsystem 3: Propulsionmentioning

confidence: 99%

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Lowest-Technical-Merit Design Methodology of Hypersonic Cruise Vehicle

et al. 2019

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In the design of hypersonic cruise vehicles, great effort is demanded to improve the performances of subsystems, namely structure, aerodynamics, and propulsion. Herein, effort demanded to realize a subsystem performance is quantified by technical merit. To achieve a feasible design, excessive technical merit of any one subsystem should be avoided. Accordingly, a lowest-technical-merit (LTM) design methodology has been proposed in this work. By this methodology, the design problem could be interpreted into a parametric optimization. The solution to such an optimization corresponds to the highest feasibility. The methodology has been implemented on two cases: deriving a hydrocarbon-fueled long-range cruiser from Boeing X-51A, and a hydrogen-fueled LAPCAT scenario from PREPHA. The simulation results show that LTM could achieve optimal allocations while satisfying different payload/range performances. The design methodology could help to improve the feasibility of hypersonic cruise vehicles. Furthermore, it could also be used in the design of other systems.

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Section: Subsystem 3: Propulsionmentioning

confidence: 99%

“…Besides, a sharp leading edge is also preferable for aerodynamic performance [31]. However, speed beyond Mach 5 would induce prominent aerodynamic heating on surfaces [32]. The heat flux at the leading edge is in negative correlation with the local radius of curvature.…”

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confidence: 99%

Lowest-Technical-Merit Design Methodology of Hypersonic Cruise Vehicle

et al. 2019

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“…Shape definition is often carried out using parametric equations (Joodaki and Ashrafizadeh 2014;Samareh 1999) as most shapes are intrinsically independent of any coordinate system. Various optimization techniques have been used to search for the optimal configuration of fluid flow equipment, for example, gradient-based optimization techniques, global optimization by dimensionality reduction techniques such as the Karhunen-Loève expansion and evolutionary approaches such as genetic algorithms, particle swarm optimization (a method which shares many features with genetic algorithms), firefly algorithms and surface methods (Avvari and Jayanti 2013;Chen et al 2015;Diez, Campana, and Stern 2015;Elsayed and Lacor 2013;Eyi and Yumuşak 2015;Kazemzadeh-Parsi et al 2015;Raghavan et al 2013;Safikhani, Hajiloo, and Ranjbar 2011;Said et al 2015;Tesch and Kaczorowska 2015).…”

Section: Introductionmentioning

confidence: 99%

Shape optimization of flow split ducting elements using an improved Box complex method

Srinivasan

Balamurugan

Jayanti

2016

Engineering Optimization

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Iterative search methods, such as the Box complex method, can be used for inverse shape design problems. In the present article, an improved version of the Box complex method is proposed specifically for computational fluid dynamics-based optimization of fluid flow ducting elements. The original Box complex method is improved by (1) assigning non-uniform weights for the estimation of the centroid, (2) using a reduced reflection factor for accelerated convergence, and (3) introducing measures to prevent premature breakdown of the iterative process. The success of the improved Box complex method over the original Box complex method is demonstrated on two benchmark functions and by applying it to two fluid flow problems of engineering. The improved method is shown to substantially accelerate the convergence with approximately 50% reduction in computational effort for the T-junction and manifold problems. ARTICLE HISTORYInverse shape design; internal flow; computational fluid dynamics; search algorithms; Box complex method; computational efficiency

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“…However, speed beyond Mach 5 would induce severe aerodynamic heating on surfaces [9]. To withstand the aerothermodynamics over a long range, a comprehensive and complicated thermal protection/management system is demanded [10], [11].…”

Section: Introductionmentioning

confidence: 99%

Optimal Periodic Control of Hypersonic Cruise Vehicle: Trajectory Features

et al. 2019

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Optimal periodic control is an effective technique to reduce aerodynamic heating and fuel consumption of hypersonic cruise vehicles. Herein, this optimal control problem has been solved by nonlinear programming and passed the posteriori check of optimality. The results indicate that the lift coefficient and velocity in dynamical model could be recognized as constants. Accordingly, the original 3D system consists of velocity, flight path angle, and altitude, which could be decoupled into a 2D subsystem and a 1D one. The 2D subsystem could describe the correlation between the flight path angle and altitude. And the period length is mainly dependent on the maximum altitude difference. The 1D subsystem has been proved to be feasible to describe the variation of kinetic energy or velocity. On basis of the subsystems, the heating and fuel performances of periodic cruise have been studied. The heating performance is mainly dependent on the maximum altitude difference, and the fuel consumption is mainly dependent on the drag coefficient. The features concluded in this paper can support rapid trajectory planning or suboptimal feedback design of hypersonic cruise vehicles. INDEX TERMS Optimal periodic control, hypersonic cruise vehicle, trajectory features, performances.

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Aerothermodynamic shape optimization of hypersonic blunt bodies

Cited by 16 publications

References 23 publications

Lowest-Technical-Merit Design Methodology of Hypersonic Cruise Vehicle

Lowest-Technical-Merit Design Methodology of Hypersonic Cruise Vehicle

Shape optimization of flow split ducting elements using an improved Box complex method

Optimal Periodic Control of Hypersonic Cruise Vehicle: Trajectory Features

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