Journal ArticleDOI
Computationally fast harmonic balance methods for unsteady aerodynamic predictions of helicopter rotors
TLDR
A harmonic balance technique for the analysis of unsteady flows about helicopter rotors in forward flight and hover is presented and the method is applied to the three-dimensional Euler equations, and the steady and unsteadY aerodynamics about wings and rotors is examined.About:
This article is published in Journal of Computational Physics.The article was published on 2008-06-01. It has received 83 citations till now. The article focuses on the topics: Helicopter rotor & Aerodynamics.read more
Citations
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Journal ArticleDOI
The harmonic balance method for bifurcation analysis of large-scale nonlinear mechanical systems
TL;DR: In this article, an algorithm that combines the computation of the Floquet exponents with bordering techniques is developed for the detection and tracking of bifurcations of nonlinear systems.
Journal ArticleDOI
Nonlinear Analysis of Unsteady Flows in Multistage Turbomachines Using Harmonic Balance
Kivanc Ekici,Kenneth C. Hall +1 more
TL;DR: In this article, a harmonic balance technique for the analysis of two-dimensional linear (small disturbance) and nonlinear unsteady flows in multistage turbomachines is presented, where each blade row is modeled using a computational grid spanning a single blade passage.
Journal ArticleDOI
Harmonic balance methods applied to computational fluid dynamics problems
TL;DR: In this article, the authors briefly review the classical harmonic balance method and describe the adaptation of the method required for its application to computational fluid dynamics models of unsteady time periodic flows.
Journal ArticleDOI
On a new harmonic selection technique for harmonic balance method
TL;DR: In this article, the adaptive harmonic balance method (AHBM) is used for harmonic selection in nonlinear dynamic systems with a tangent predictor and a stepwise regression procedure that allows for dynamic management of the number of selected harmonics via an addition or removal procedure.
Journal ArticleDOI
Harmonic Balance Analysis of Limit Cycle Oscillations in Turbomachinery
Kivanc Ekici,Kenneth C. Hall +1 more
TL;DR: In this article, a nonlinear frequency-domain (harmonic balance) approach is used to model the blade row of a turbomachine on a computational grid spanning a single blade passage, and several solutions, each corresponding to a different subtime level of the periodic unsteady flow, are computed simultaneously.
References
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Journal ArticleDOI
Computation of Unsteady Nonlinear Flows in Cascades Using a Harmonic Balance Technique
TL;DR: In this paper, a harmonic balance technique for modeling unsteady nonlinear e ows in turbomachinery is presented, which exploits the fact that many unstaidy e ow variables are periodic in time.
Experimental and Analytical Studies of a Model Helicopter Rotor in Hover
F. X. Caradonna,C. Tung +1 more
TL;DR: In this paper, a benchmark test to aid the development of various rotor performance codes was conducted, where simultaneous blade pressure measurements and tip vortex surveys were made for a wide range of tip Mach numbers including the transonic flow regime.
Related Papers (5)
Computation of Unsteady Nonlinear Flows in Cascades Using a Harmonic Balance Technique
Nonlinear Analysis of Unsteady Flows in Multistage Turbomachines Using Harmonic Balance
Kivanc Ekici,Kenneth C. Hall +1 more