ISBN-10: 1634833368

ISBN-13: 9781634833363

In early levels of an plane layout technique, it is important to figure out the minimal thrust or strength requirement and quickly decide on the correct propulsion, which comprises a decent coupling among flight functionality and missions’ analyses, engine functionality prediction and layout optimization. the 1st bankruptcy of this e-book presents an summary of the way to figure out the minimal thrust or strength requisites for jet and propeller driving force shipping plane. the second one bankruptcy examines the excellent modeling and layout of construction strategies of airplane meeting. the ultimate bankruptcy specializes in the computational modeling of the Be-200 and Be-103 amphibious plane versions. (Imprint: Nova)

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There were many gas turbine codes capable of generating the performance for use in preliminary design and engine airframe integration studies. Computer programs such as GENENG [57] and GENENGII [58] enabled users analyzing the steady state performance of a wide variety of engines by providing the performance map of each component, in addition to Navy-NASA Engine Program NNEP [59] which incorporates the chemical equilibrium gas calculations, engine control variations and additional capabilities for optimization.

In parallel to that, there has been an average increase in gas cycle maximum temperature TIT of about 8K per a year over last 20 years [32]. Aerothermodynamic performance of turbofan engines are discussed in details by several authors [32, 33, 34] who provided extensive theoretical coverage, but the issue of optimized design received less attention. In the early years, engine selection and analysis were based primarily on cycle trade studies and the past experience. Cohen et al. [35] presented a method for finding the optimum design parameters, by considering one parameter, for example the fan pressure ratio FPR, when the overall pressure ratio OPR, bypass ratio BPR and TIT are held constant.

RRAP as presented in Jones et al. [65] is a hybrid combination of Genesis and other tools which can be used to quickly define gas turbines engines within a design procedure that considers engine performance. As described by Claus et al. [66] and Lytle [67], the code Numerical Propulsion System Simulator NPSS can tackle different levels of modeling fidelity, from simple thermodynamic cycle calculations to full 3D whole-engine CFD simulations. The object-oriented analysis framework of NPSS [70] was used to perform the gas turbine analyses based on standard elements for gas turbine components, configured into steady-state thermodynamic models with the aim of reducing time and cost in developing new propulsion systems.

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Aircraft Design, Technology and Safety


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