Session: 

Paper Number: 151388

Exploring Cutting Dynamics and Temperature Effects on Honeycomb Abradable Materials 

In the field of gas turbines and energy efficiency, the use of abradable materials and honeycomb capabilities is crucial. These materials, when adequately sized, allow clearances minimization thanks to rotor seal optimized penetration on the stator seal. This makes the clearance independent of mechanical uncertainties, thereby eliminating engine to engine variability.

The usability of these materials is critical and depends on factors such as the type of embrasure, cutting speed, temperature, and incursion. Additionally, risks associated with coating loss and possible overheating need to be addressed.

Scope of this paper is to describe the design and the results of a rub test which explored the cutting dynamics and validated the use of honeycomb as an abradable support at low rotation speeds. The test replicates the geometry of a turbine section operating at low speeds and temperatures. Test bench was equipped with real time temperature measurements on both rotor and stator. An induction system has been used for heating and a lathe to manage the cutting parameters (rotation speed and incursion).

Results obtained from test runs are here discussed to evaluate the response of both abradable and abradant materials within this temperature range up to 400°C and validate their use in turbomachinery applications.

Keywords: Rub Test, Honeycomb, cutting speed, Raid speed, abradable, Abradant, Finite Element Modelling.

Presenting Author: Alessandro Garofalo Baker Hughes

Presenting Author Biography: I graduated from the University of Rome “La Sapienza” with a degree in Energy Engineering. With a strong academic background and a passion for technological innovation, I embarked on a career in the Oil & Gas sector, where I have accumulated over six years of experience.
Initially, I worked as an external consultant, specializing in the mechanical design of stator and rotor components, with a particular focus on mechanical& thermomechanical analyses using the finite element method (FEM). This experience allowed me to develop advanced skills in modeling and simulating complex systems.
In 2021, I took a significant step forward in my career by joining Baker Hughes (BH) as a Design Engineer Specialist in Clearance. In this role, I have continued to excel in tackling complex technical challenges and developing innovative solutions.
Currently, I am engaged in developing advanced diagnostic methodologies for real-time analysis of closures, contributing to improving the efficiency and reliability of energy systems. My dedication to research and innovation makes me a reference point in my field, always seeking new opportunities to apply my knowledge and skills.

Authors:

Alessandro Garofalo Baker Hughes
Giacomo Ragni Baker Hughes
Paolo Del Turco Baker Hughes
Paolo Di Sisto Baker Hughes