Analysis of a turbine bladed disk with structural and aerodynamic mistuning

Dimitri Franz, Loic Salles, Sina Stapelfeldt

Результат исследований: Глава в книге, отчете, сборнике статейМатериалы для конференциирецензирование

2 Цитирования (Scopus)

Аннотация

In this paper the effects of mistuning on the flutter stability of a turbine blade are analysed. Two types of mistuning are considered, frequency mistuning and aerodynamic mistuning. The study concentrates on the the first family of modes (1F, first flap) as the blade fluttered in this mode during test. For the frequency mistuning analysis, the 1F frequency is varied around the annulus but the 1F mode shapes remain the same for all the blades. The mistuning analyses are performed by using a reduced order model (ROM) based on an eigenvalue analysis of the linearized modal aeroelastic system with the aerodynamic matrix calculated from the aerodynamic influence coefficients. The influence coefficients required for this algorithm are obtained from a three-dimensional, non-linear aeroelastic solver (AU3D) by shaking one blade in the datum (tuned) frequency and mode and recording aerodynamic forces on the other blades in the assembly. After the ROM is validated against the non-linear method for the tuned case, it is used for the mistuning and mis-staggering study as time-domain computations of such cases are very time consuming. The results of this paper indicate that, frequency mistuning is always stabilizing but aerodynamic mistuning can be destabilizing under certain conditions. Moreover, it is shown that the effect of frequency mistuning is much higher than the one of aerodynamic asymmetries and that structural coupling limits the effects of mistuning.

Язык оригиналаАнглийский
Название основной публикацииStructures and Dynamics
ИздательAmerican Society of Mechanical Engineers (ASME)
ISBN (электронное издание)9780791850930
DOI
СостояниеОпубликовано - 2017
Опубликовано для внешнего пользованияДа
СобытиеASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, GT 2017 - Charlotte, Соединенные Штаты Америки
Продолжительность: 26 июн. 201730 июн. 2017

Серия публикаций

НазваниеProceedings of the ASME Turbo Expo
Том7B-2017

Конференция

КонференцияASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, GT 2017
Страна/TерриторияСоединенные Штаты Америки
ГородCharlotte
Период26/06/1730/06/17

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