Current economic constraints and environmental regulations call for design of more efficient
aircraft configurations. An observed trend in aircraft design to reduce the lift induced drag …

There are numerous unsteady flow influences in turbomachinery. These can potentially
make a substantial total impact on efficiency, and hence the environment and operating …

The harmonic balance (HB) method is widely used in the literature for analyzing the periodic
solutions of nonlinear mechanical systems. The objective of this paper is to exploit the …

Rapid increase in computing power has made a huge difference in scales and complexities
of the problems in turbomachinery that we can tackle by use of computational fluid dynamics …

We extend linear input/output (resolvent) analysis to take into account nonlinear triadic
interactions by considering a finite number of harmonics in the frequency domain using the …

In this paper, we briefly review the classical harmonic balance method, and describe the
adaptation of the method required for its application to computational fluid dynamics models …

This article describes a nonlinear frequency domain method for the simulation of unsteady
blade row interaction problems across several blade rows in turbomachinery. The capability …

Many industrial applications involve flows periodic in time. Such flows are not simulated with
enough efficiency when using classical unsteady techniques, as a transient regime must be …

Efficient numerical tools taking advantage of the ever increasing power of high-performance
computers, become key elements in the fields of energy supply and transportation, not only …

A harmonic balance technique for the analysis of unsteady flows about helicopter rotors in
forward flight and hover is presented in this paper. The aerodynamics of forward flight are …