A Unique Conceptual Design Approach: Generic Design Space Screening and Convergence of Hypersonic Vehicles

2006 ◽  
Author(s):  
Kristen Roberts ◽  
Brad Mixon ◽  
Bernd Chudoba ◽  
Xiao Huang
Keyword(s):  
Conceptual Design ◽  
Design Space ◽  
Design Approach ◽  
Hypersonic Vehicles ◽  
Generic Design

scholarly journals Configuration Study of Electric Helicopters for Urban Air Mobility

Aerospace ◽  
2021 ◽  
Vol 8 (2) ◽  
pp. 54
Author(s):  
Julia A. Cole ◽  
Lauren Rajauski ◽  
Andrew Loughran ◽  
Alexander Karpowicz ◽  
Stefanie Salinger
Keyword(s):  
Conceptual Design ◽  
Urban Areas ◽  
Design Space ◽  
Design Method ◽  
Urban Air ◽  
Main Rotor ◽  
Potential Benefits ◽  
Compound Helicopter ◽  
Configuration Changes

There is currently interest in the design of small electric vertical take-off and landing aircraft to alleviate ground traffic and congestion in major urban areas. To support progress in this area, a conceptual design method for single-main-rotor and lift-augmented compound electric helicopters has been developed. The design method was used to investigate the feasible design space for electric helicopters based on varying mission profiles and technology assumptions. Within the feasible design space, it was found that a crossover boundary exists as a function of cruise distance and hover time where the most efficient configuration changes from a single-main-rotor helicopter to a lift-augmented compound helicopter. In general, for longer cruise distances and shorter hover times, the lift-augmented compound helicopter is the more efficient configuration. An additional study was conducted to investigate the potential benefits of decoupling the main rotor from the tail rotor. This study showed that decoupling the main rotor and tail rotor has the potential to reduce the total mission energy required in all cases, allowing for increases in mission distances and hover times on the order of 5% for a given battery size.

A new conceptual design approach for habitative space modules

2014 ◽  
Vol 97 ◽  
pp. 1-8 ◽  
Author(s):  
C. Burattini ◽  
F. Bisegna ◽  
F. Gugliermetti ◽  
M. Marchetti
Keyword(s):  
Conceptual Design ◽  
Design Approach

The Design Space of Superalloy-Based Actively Cooled Combustor Walls for H2-Powered Hypersonic Vehicles

2007 ◽  
Author(s):  
Lorenzo Valdevit ◽  
Natasha Vermaak ◽  
Frank W. Zok ◽  
A. G. Evans
Keyword(s):  
Design Space ◽  
Ceramic Matrix Composites ◽  
Nickel Superalloy ◽  
Hypersonic Vehicles ◽  
Matrix Composites ◽  
Niobium Alloys ◽  
Design Constraint ◽  
Mechanical Loads ◽  
Nickel Copper ◽  
Wide Range

The walls of combustion chambers used for air-breathing hypersonic vehicles are subject to substantial thermo-mechanical loads, and require active cooling by the fuel in conjunction with advanced material systems. Solutions based on metallics are preferable to ceramic matrix composites due to their lower cost and greater structural robustness. Previous work suggested that a number of metallic materials (e.g. Nickel, Copper and Niobium alloys) could be used to fabricate actively cooled sandwich structures that withstand the thermo-mechanical loads for a Mach 7, hydrocarbon-powered vehicle (albeit with different weight efficiencies). However, this conclusion changes when the Mach number is increased. This work explores the feasibility of the Nickel superalloy MARM246 for a wide range of Mach numbers (7–12). Since hydrocarbon fuels are limited to Mach 7–8, Hydrogen is used as the coolant of choice. A previously derived analytical model (appropriately modified for gaseous coolant) is used to explore the design space. The relative importance of each design constraint is assessed, resulting in the distillation of essential guidelines for optimal design.

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