Open Access
HPC design based on multidisciplinary numerical simulation
TLDR
The methodology is used to estimate the efficiency of alternative secondary flows schemes with hot gas redirection to a compressor's disks hubs in order to minimize disks temperature gradients and to stabilize clearances aimed to achieve higher efficiency and gas-dynamic stability.Abstract:
The methodology to solve the interrelated problems of secondary gas flows in turbomachines, thermal and stressed states of their parts, and clearance change over a flight cycle is described using an example of high pressure compressors (HPC) of aviation engines. An iterative calculating scheme is proposed to take into account mutual interferences between these solution modules. An additional optimization module is used to minimize weight and to achieve the prescribed displacements and safety margins. Mathematical 1D and 2D models for accurate calculation of secondary flows are described in detail. The results of the application of this iterative calculation scheme for the HPC with one of the possible secondary flows design are shown. The methodology is used to estimate the efficiency of alternative secondary flows schemes with hot gas redirection to a compressor's disks hubs in order to minimize disks temperature gradients and to stabilize clearances aimed to achieve higher efficiency and gas-dynamic stability.read more
Citations
More filters
Journal ArticleDOI
Thermal-Fatigue Analysis of Turbine Discs under Complex Thermo-Mechanical Loading with Account of Plasticity and Creep Effects
TL;DR: In this paper, the authors used theories of plasticity and creep to determine the complex stress-strain state in the stress concentration zone for disc rims, and a modern failure criterion which can predict lifetime under conditions of simultaneous plastic and creep strain accumulation.
Numerical simulation of nonisothermal plasticity and thermomechanical fatigue of turbomachinery components
TL;DR: In this paper, a model of cyclic stress-strain curve and corresponded damage model are developed for simulation of nonisothermal cyclic loading and for estimating life time of turbomachinery components.
References
More filters
Journal ArticleDOI
NLPQL: A fortran subroutine solving constrained nonlinear programming problems
TL;DR: The organization of NLPQL is discussed, including the formulation of the subproblem and the information that must be provided by a user, and the performance of different algorithmic options is compared with that of some other available codes.
Book
Turbomachinery Rotordynamics: Phenomena, Modeling, and Analysis
TL;DR: In this paper, structural-Dynamic Models and Eigenanalysis for Undamped Flexible Rotors are presented. But they do not consider the non-uniformity of Rotordynamic Models for Liquid Annular Seals.
Journal ArticleDOI
An Iwatsubo-Based Solution for Labyrinth Seals: Comparison to Experimental Results
Dara W. Childs,J. K. Scharrer +1 more
TL;DR: In this paper, the authors derived linearized zeroth and first-order perturbation equations for small motion about a centered position by an expansion in the eccentricity ratio.
Proceedings ArticleDOI
Efficient FEA/CFD Thermal Coupling for Engineering Applications
TL;DR: In this paper, an efficient finite element analysis/computational fluid dynamics (FEA/CFD) thermal coupling technique has been developed and demonstrated, which is achieved by an iterative procedure between FEA and CFD calculations.
Proceedings ArticleDOI
Integrated Fluid Network-Thermomechanical Approach for the Coupled Analysis of a Jet Engine
TL;DR: In this article, the existing interactions between secondary air properties and material thermomechanical properties (temperatures, pressures and mass flow rates) were taken into consideration in a robust and modular analysis tool, combining air system, thermal and mechanical analysis.