Wave drag determination in the transonic full-potential flow code matrics

The mathematical background is described of a method that is currently being developed at NLR to calculated wave drag in transonic potential flow. The method is a generalization and extension of Garabedian's and McFadden's idea of determining wave drag by volume-integration of the artificial viscosity. The generalization of Garabedian's and...

Trends in CFD for aeronautical 3-D steady applications: The Dutch situation

Current and mid-term developments in computational 3-D steady aerodynamics software at NLR, focusing on the efficient aerodynamic design of the next generation of transport aircraft, are surveyed on a global level. Following a brief review of the various levels of sophistication in physical flow modelling, and their relation to the aerodynamic...

Matrix, transonic potential flow calculations about transport aircraft

MATRICS is a system under development for the calculation of transonic (potential) flow about transport aircraft. The paper discusses the motivation for this development, as well as the basic concepts of the system. Details of the full potential flow solver, involving the newly developed ILU/SIP relaxation scheme, are given. A discussion on...

Matrics (multi-component aircraft transonic inviscid computation system): preliminary document

In the present document the pre-design will be presented of the system MATRICS (Multi-component Aircraft Transonic Inviscid Computation System). The system will be able to calculate the inviscid steady transonic flow about complex transport aircraft under cruise conditions; both jet-aircraft and propeller-aircraft can be simulated. As such the...

Robust calculation of 3D transonic potential flow based on the non-linear FAS multi-grid method and incomplete LU decomposition

Two relaxation-algorithms and a number of restriction/prolongation-processes are compared within a non-linear FAS multi-grid research code. Paper focuses on the choice of relaxationalgorithm, which should be fast, robust (stable convergence for all local flow directions) and insensitive (good short wave damping for all possible mesh ratios). A...