Methodology for Performance Analysis of Aerospace Vehicles Using the Laws of Thermodynamics

Riggins, David W.; Taylor, Trent; Moorhouse, David J.

doi:10.2514/1.16426

Cited by 38 publications

(23 citation statements)

References 12 publications

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“…The relationship between the overall net aero/propulsive fluiddynamic force in the direction of aerospace vehicle movement and entropy production and energy effects has been derived and discussed in [6]; see the development in this earlier work for notation and definitions. This availability rate balance is derived from fundamental energy and entropy considerations applied to the global or overall control volume as sketched in Fig.…”

Section: Availability Balance For Aerospacementioning

confidence: 99%

“…in terms of the plane perpendicular to vehicle movement) in order to realize the asymptotic limit inherent in the wake mixing process itself, for accurate analytical computation of the wake entropy generation. However, there is no necessity to define an axial length scale for the wake region since the wake entropy generation computation is defined by a simple single-step flow rate based analytical procedure between stations e and w [6].…”

Section: Availability Balance For Aerospacementioning

confidence: 99%

“…(1-4) which describe the availability rate balance for an aerospace vehicle in flight at velocity V, are formally derived in [6] using the assumption of steady flow throughout the global control volume. Therefore, when integrating across time as done here, it is assumed that the time and amplitude scale of dynamic events (such as those associated with vehicle accelerations) are not sufficient to significantly affect that availability balance at any given time of interest.…”

Section: Combination Of Availability Balance With Vehicle Equatimentioning

confidence: 99%

“…They noted the importance of the net overall fluid-dynamic force component experienced by all vehicle surfaces in the direction of vehicle movement within that balance. Riggins et al [6] more recently provided the availability rate balance for a general aerospace vehicle with propellant mass and energy addition and chemical reaction. The main objective of the current paper is to provide a detailed analytical examination of the general characteristics of this governing availability rate balance for general aerospace vehicles in terms of flight regimes and broad vehicle types.…”

mentioning

confidence: 99%

“…In addition to past work involving specific overall availability balances for aerospace vehicles which has been described previously in this section as particularly relevant to the current paper (i.e. [3][4][5][6]), Greene [20] examined the role of entropy for induced drag minimization on low-speed airfoils using concepts related to this earlier work. Roth [21] and Roth and Mavris [22] have usefully extended work potential methods to a vehicle airframe with a turbine engine propulsion system and overall vehicle system loss management.…”

mentioning

confidence: 99%

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Characterization of Aerospace Vehicle Performance and Mission Analysis Using Thermodynamic Availability

Riggins

Moorhouse

Camberos

2010

Journal of Aircraft

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The fundamental relationship between entropy and aerospace vehicle and mission performance is analyzed in terms of the general availability rate balance between force-based vehicle performance, available energy associated with expended propellant, and the overall loss rate of availability, including the vehicle wake. The availability relationship for a vehicle is analytically combined with the vehicle equations of motion; this combination yields the balance between on-board energy rate usage and rates of changes in kinetic and potential energies of the vehicle and overall rate of entropy production. This result is then integrated over time for a general aerospace mission; as examples, simplified single-stage-to-orbit rocket-powered and air-breathing missions are analyzed. Examination of rate of availability loss for the general case of an accelerating, climbing aerospace vehicle provides a powerful loss superposition principle in terms of the separate evaluation and combination of loss rates for the same vehicle in cruise, acceleration, and climb. Rate of availability losses is also examined in terms of separable losses associated with the propulsion system and external aerodynamics. These loss terms are cast in terms of conventional parameters such as drag coefficient and engine specific impulse. Finally, rate losses in availability for classes of vehicles are described.

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Section: Availability Balance For Aerospacementioning

confidence: 99%

Section: Availability Balance For Aerospacementioning

confidence: 99%

Section: Combination Of Availability Balance With Vehicle Equatimentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Characterization of Aerospace Vehicle Performance and Mission Analysis Using Thermodynamic Availability

Riggins

Moorhouse

Camberos

2010

Journal of Aircraft

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Thermodynamic-based analyses and assessments of a new-generation turbojet engine used for unmanned aerial vehicles (UAVs)

Şöhret

Çalışkan

2022

J Therm Anal Calorim

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Conceptual design and optimization of scramjet engines using the exergy method

Zhu

Zhang

Zheng

2018

J Braz. Soc. Mech. Sci. Eng.

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The exergy-based multidisciplinary optimization (MDO) method has been applied to conceptual design of a scramjet engine by analyzing the available energy in each subsystem within a highly integrated and high efficiency required vehicle. Regarding the conceptual design of a scramjet, the stream thrust method has been adopted to calculate each subsystem's in/out area, i.e., inlet, isolator, combustor and nozzle. Next, a newly developed evaluation program was utilized to evaluate the performance of the vehicle's internal flow. With the calculated state parameters obtained from the evaluation program results, the exergy analysis was then performed. Subsequently, genetic algorithm and non-dominated sorting genetic algorithm were used to optimize the design variables. The maximum exergy efficiency was measured and the specific impulse (I sp) optimization was conducted separately, and a multi-objective optimization containing both was also investigated. The results demonstrated that the optimization objective with exergy efficiency was suitable for long-endurance vehicles and high-efficiency fuel utilization, the maximum I sp was suitable for high acceleration and high thrust, and the Pareto front could address both needs. It was also found that the cycle static temperature ratio and static pressure ratio of the nozzle should be specifically set at an optimized value to obtain the maximum exergy efficiency and I sp .

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Methodology for Performance Analysis of Aerospace Vehicles Using the Laws of Thermodynamics

Cited by 38 publications

References 12 publications

Characterization of Aerospace Vehicle Performance and Mission Analysis Using Thermodynamic Availability

Characterization of Aerospace Vehicle Performance and Mission Analysis Using Thermodynamic Availability

Thermodynamic-based analyses and assessments of a new-generation turbojet engine used for unmanned aerial vehicles (UAVs)

Conceptual design and optimization of scramjet engines using the exergy method

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