Conference proceeding
Lattice Boltzmann Simulations of Wave Propagation through a High-Pressure Turbine Stage
AIAA AVIATION 2021 FORUM
AIAA Aviation Forum (Virtual, 08/02/2021–08/06/2021)
2021
Handle:
https://hdl.handle.net/2376/122192
Appears in Aviation Sustainability Center (ASCENT)
Abstract
Combustion noise is becoming an increasingly important contributor to the overall engine noise in future advanced aircraft designs. Reliable tools for predicting the generation and propagation of combustion noise are needed to support the design process for both low noise and low emissions next generation combustors. In the present study, a high-fidelity very-large eddy simulation approach based on the Lattice Boltzmann method is employed to study wave interaction with a high-speed turbine stage. The simulations consider direct noise propagation through the turbine as well as indirect noise generation from entropy wave injection into the turbine stage, mimicking the experiments conducted at Politecnico di Milano. The simulations are successfully validated against experimental data and confirm that, for the turbine stage considered in this study, only a small fraction (<10%) of the sound power is transmitted through the stage, with ~30% being reflected but more than 60% of the sound power being dissipated or otherwise lost during the wave transmission process. The large amount of the unaccounted part of the sound power is captured correctly by the high-fidelity simulations but is not captured by existing reduced-order models, like actuator disk theory, and requires further consideration. This work is part of a larger study to understand and better model combustion noise of advanced combustors and its propagation.
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Details
- Title
- Lattice Boltzmann Simulations of Wave Propagation through a High-Pressure Turbine Stage
- Creators
- Julian WinklerJeffrey M. Mendoza
- Publication Details
- AIAA AVIATION 2021 FORUM
- Conference
- AIAA Aviation Forum (Virtual, 08/02/2021–08/06/2021)
- Academic Unit
- Aviation Sustainability Center (ASCENT); Noise
- Grants
- 13-C-AJFE-GIT-058, Federal Aviation Administration (United States, Washington) - FAA
- Identifiers
- 99900621886201842
- Language
- English
- Resource Type
- Conference proceeding