Brown Bag Seminar
Friday, April 14, 2023
11:00 am – 12:00 pm
Weber, Classroom II
Presenters:
Divya Kalaria
Lonnie Webb
Reid Fly
Divya Kalaria
Title:
CFD Analysis on Open Rotor Concept
Abstract:
Using Star-CCM+ to analyze efficiency of Open Rotor concept at certain Mach numbers and advance ratios. Examine pressure coefficients throughout the geometry and determine the best possible rotor blade beta angle to maximize efficiency. Change beta angle of swirl recovery vane (SRV) to determine the best possible angle for high efficiency for baseline open rotor case. Change beta angles for both rotor and SRV at the same time to determine the best possible angle suited to provide high efficiency. Verification was used for the efficiencies by comparing them with low-fidelity code to ensure the values determined from high-fidelity code result in similar values.
Advisor:
Prof. Dimitri Mavris
Lonnie A. Webb
Title:
Flow Visualization of Effusion Cooling in Gas Turbine Engines
Abstract:
This study examines effusion cooling in gas turbine engines, specifically focusing on the impact of various cooling plate geometries on flow characteristics. The study employed a nonreacting flow with smoke to enable the visualization of flow patterns through the use of Mie scattering. Qualitative analyses were carried out to determine the effectiveness of each geometry in promoting efficient effusion cooling. By comparing and contrasting the distinct flow characteristics associated with different geometries, this research aims to lend insight into the effect of different geometries on performance.
Advisor:
Prof. Timothy Lieuwen
Reid D. Fly
Title:
Acoustic Operability Mapping of Scaled Can Combustors
Abstract:
Acoustic instabilities – large-amplitude excitations of the natural frequencies of a combustor – have plagued combustion for decades. From steam boilers to the F-1 rocket engine, these instabilities can have consequences ranging from excessive noise and emissions to catastrophic structural failure. As the gas turbine combustion industry continues to push the boundaries of efficiency and power, the operational limitations imposed by combustion acoustics have become more important driving factors for design and operating conditions. In this experimental campaign, we endeavor to explore the impact of design considerations and operational methods of a scaled can combustor centered around novel additively manufactured fuel injectors. Through the use of a variable acoustic length, we are able to efficiently sweep a range of natural frequencies and measure the corresponding system response. This will allow us to derive an understanding of which control parameters drive these swirlers’ forcing frequencies in order to inform design and operation decisions when the hardware is deployed in real-world energy generation environments.
Advisor:
Professor Tim Lieuwen