New approaches to multidisciplinary design optimization have been developed and demonstrated in a NASA Langley funded project to look at a particularly challenging aeronautics problem – High Speed Civil Transport Aeroelastic Wing Design. In particular, the problem is how to incorporate key multidisciplinary information and knowledge as it becomes available. This problem results from such inform...

This paper experimentally investigates a highly-loaded 1.5-stage transonic axial compressor, which comprises variable inlet guide vane, BLISK rotor, and stator in tandem arrangement. A detailed comparison between the newly designed compressor stage reference with conventional design was conducted by using extensive instrumentation. Thus, steady unsteady phenomena—focusing on aerodynamic aeroela...

In aerodynamics as in other sciences, there are some phenomena which widely explained a way that under closer look turns out to be based on wrong assumptions and thus not very convincing. One of these is the effect referred vapour cone or shock collar cloud condensed water conical shape forms around objects travelling at transonic speeds through moist air. This paper aims shed light basic princ...

Designs for future aero engines aim increased efficiency with reduced exhaust gas and noise emissions. To achieve these goals, comprehensive physical understanding highly innovative solutions are necessary. Even though computational capabilities rising, the required confidence level is restrained. understand validate theoretical numerical models, extensive experiments at realistic operating con...

The aerodynamics of transport aircraft at the borders flight envelope is characterized by complex interactions and nonlinear, unsteady flow phenomena. underlying physical mechanisms are not fully understood, a prediction aerodynamic properties, transient loads, aeroelastic behavior major challenge that requires use sophisticated numerical models dedicated experiments. A new research initiative ...

Designs for future aero engines aim increased efficiency with reduced exhaust gas and noise emissions. To achieve these goals, comprehensive physical understanding highly innovative solutions are necessary. Even though computational capabilities rising, the required confidence level is restrained. understand validate theoretical numerical models, extensive experiments at realistic operating con...

We present preliminary results for the calculation of inviscid transonic flow over a complete aircraft. These results have been obtained by a novel approach that combines a new procedure for mesh generation with a new finite element method for solving the Euler equations. Introduction A principal goal of computational aerodynamics has been the calculation of transonic flow over a complete aircr...

Since the development of the IAS computer built from 1942 to 1951 at the Institute of Advanced Studies under the supervision of John von Neumann, computer engineers’ push to make the hardware more practical and efficient has been driven and challenged by a handful of applied fields. While it is widely recognized that Aerodynamics played a key role in the development of modern scientific computi...