Computational results for an 18%-scale, semi-span Gulfstream aircraft model are presented. Exa Corporation’s lattice Boltzmann PowerFLOW® solver was used to perform time-dependent simulations of the flow field associated with this high-fidelity aircraft model. The simulations were obtained for free-air at a Mach number of 0.2 with the flap deflected at 39o (landing configuration). We focused on...

The structural health of airframes is often monitored by analysis of the frequency of occurrence matrix (FOOM) produced after each flight. Each cell in the matrix records a stress event of a particular severity. These matrices are used to determine how much of the aircraft’s life has been used up in each flight. Unfortunately, the sensors that produce this data are subject to degradation themse...

A novel multiobjective optimisation approach utilising a genetic algorithm (GA) for the preliminary design of airframes is introduced. Concurrent GA processes each optimise one objective related to the problem. The fitness measure for individuals within each GA is adjusted by comparing the values of the variable parameters of identified solutions relating to a single objective with those of the...

Hypersonic airbreathing vehicles are characterized by highly-integrated airframe and propulsion system. Computational Fluid Dynamics (CFD) tools have been used extensively in the design and analysis phrase of hypersonic vehicles. In this paper, an engineering method and a finite volume method based on the center of grid are developed for preliminary research of interested integrative hypersonic...

The United States Air Force utilizes the Aircraft Structural Integrity Program (ASIP) to service and maintain its airframes. This schedule-based maintenance approach works well for ensuring system integrity; however, it is very costly, laborintensive, and it reduces system availability. As a result, the Air Force intends to transition to a process that services aircraft based on their actual co...

This paper summarizes the results of studies undertaken to investigate revolutionary propulsion-airframe configurations that have the potential to achieve significant noise reductions over present-day commercial transport aircraft. Using a 300 passenger BlendedWing-Body (BWB) as a baseline, several alternative low-noise propulsion-airframeaeroacoustic (PAA) technologies and design concepts were...

General aviation is an important branch of the field. As a green energy aircraft, electric aircraft component and development direction general its safety crucial. In this paper, aerodynamic dynamic characteristics under collision, lightning strikes, icing conditions are studied, kinematics models established by introducing damage factors. The STAR-CCM+ software used to simulate force moment in...

Hypersonic vehicles with single-stage-to-orbit (SSTO) capability present a major design challenge. Such vehicles reflect highly integrated airframe and propulsion systems and are also known to exhibit a large degree of interaction between the airframe and engine dynamics. Consequently, even simplified hypersonic models are characterized by tightly coupled nonlinear equations of motion. The vehi...