Lectures

About Lectures

A Lecture is a presentation of a technical paper detailing cutting-edge, emerging technology. The described technology has been successfully field tested at least once.
Lectures consist of 30 to 35 minutes of presentation and 10 to 15 minutes of questions and discussion. Normally, two lectures are presented consecutively in one 90 minute time slot.
Lecture papers are published in the symposium Proceedings.

Below is the list of lectures that will be presented at the 37th Turbomachinery Symposium:

Lecture 1 Tilting Pad Journal Bearing Starvation Effects

Tuesday, September 9, 8:45-10:15 General Assembly Theater C

Presenters:
John C. Nicholas, Rotating Machinery Technology, Inc., Wellsville, NY, Greg Elliott, Lufkin Industries, Thomas P. Shoup, Rotating Machinery Technology, Inc., Wellsville, NY, and Ed Martin, Lufkin Industries, Lufkin, TX

This paper discusses evacuated tilting pad journal bearing starvation and its detrimental effects on the rotordynamics of a gearbox pinion during a no-load API mechanical acceptance test. Possible causes are discussed along with recommended solutions aimed at preventing this type of problem from reoccurring.

Lecture 2: Journal Bearing Vibration and SSV Hash

Tuesday, September 9, 8:45-10:15 General Assembly Theater C

Presenters:
Scan M. DeCamillo, Kingsbury, Inc., Philadelphia, PA, Minhui He, James M. Byrne, BRG Machinery Consulting, LLC, Charlottesville, VA, and C. Hunter Cloud, BRG Machinery Consulting, LLC, Charlottesville, VA

Experimental data, references, and theory are provided that address a radial, low frequency, low amplitude, broadband subsynchronous vibration that has been observed over the past few years in various machinery using direct lube tilting pad journal bearings.

Lecture 3: Investigation of Corrosion Fatigue Phenomena in Transient Zone and Preventive Coating and Blade Design Against Fouling and Corrosive Environment for Mechanical Drive Turbines

Tuesday, September 9, 10:30-12:00 General Assembly Theater C

Presenters:
Satoshi Hata, Naoyuki Nagai, Toyoaki Yasui, Mitsubishi Heavy Industries, Ltd., Hiroshima, Japan, and, Hiroshi Tsukamoto, Kyushu Institute of Technology, Fukuoka, Japan

For mechanical drive steam turbines, investigation results of corrosion fatigue phenomena in the transient zone are introduced including basic phenomena on expansion line and actual design and damage experience. These results were analyzed from the standpoint of stress intensity during crack starting. In order to resolve such problems, preventive coating and blade design methods against fouling and corrosive environment are developed. Detail evaluation test results are given for coating performance using a unique test procedure simulating fouling phenomena and washing condition. Finally, the results of successful modification of internals and online washing result at-site are introduced.

Lecture 4: Design and Mitigation Techniques for Applications with Possible Liquid Contamination of the Sealing Gas Dry Gas Seal System

Tuesday, September 9, 10:30-12:00 General Assembly Theater C

Presenters:
James F. McCraw, BP America, Houston, TX, Vladimir Bakalchuk, and Richard Hosanna, John Crane Inc., Morton Grove, IL

A compressor in a natural gas gathering service experienced seal failures on the discharge end. This paper discusses the findings of the study, resulting modifications of the dry gas seals, seal controls, and the compressor itself. It also outlines techniques that have been developed to mitigate the situation without having to shut the unit down. And it also presents a design approach to the sealing and seal monitoring in processes where liquid ingress into the sealing area may occur, including seal material selection, control system philosophy, seal head, and bearing cavity design.

Lecture 5: Torsional Vibration Problem with Motor/ID Fan System Due to PWM Variable Frequency Drive

Tuesday, September 9, 2:00-3:30 General Assembly Theater C

Presenters:
Troy Feese, Engineering Dynamics Inc., San Antonio, TX, and Ryan Maxfield, Tesoro Refining & Marketing Co., Martinez, CA

Excessive torsional vibration and resulting failures of the couplings and motor shaft were caused by an unforeseen interaction between the PWM inverter and the lightly damped first torsional mode of the motor/ID fan. Solving the "system" problem required mechanical and electrical engineers working together to identify the root cause of the mechanical failures and then to redesign the variable frequency drive and controls.

Lecture 6: Torsional Interharmonic Interaction Study of 75 MW Direct-Driven VSDS Motor Compressor Trains for LNG Duty

Tuesday, September 9, 2:00-3:30 General Assembly Theater C

Presenters:
Volker H�tten, Siemens Power Generation, Duisburg, Germany, Rainer Zurowski, Siemens Power Transmission and Distribution Services, Erlangen, Germany, Martin Hilscher, Siemens Automation and Drives, N�rnberg, Germany

Lecture 7: A New Method of Accurately Identifying the Location and Movement of Forward and Backward Bending Modes Using Magnetically Suspended Rotor Systems

Wednesday, September 10, 8:30-10:00 General Assembly Theater C

Presenter:
Jigger Jumonville, Mafi-Trench Co., LLC, Santa Maria, CA

This paper presents a method of accurately measuring the forward and backward bending modes in magnetically levitated rotor systems. Actual data are presented, accurately showing the movement of modes as high as the ninth bending mode.

Lecture 8: World's First 10,000 PSI Sour Gas Injection Compressor

Wednesday, September 10, 9:15-10:00 General Assembly Theater C

Presenters:
Bruce Hopper, Consultant, Leonardo Baldassarre, GE Oil & Gas, Irvin Deviteaux, TengizChevroil, John Fulton, Exxon Mobil Research and Engineering, Pete Rasmussen, Exxon Mobil Upstream Research Co., Houston, TX, Alberto Tesei, GE Oil & Gas, Jim Demetriou, and Sam Mishael, Chevron Energy Technology Co.

Sour gas injection at very high pressures stretches existing worldwide technology in several enabling areas. This paper describes risk management methodology and mitigation in the areas of design, operation, testing, startup, and operation, together with the organizational, manpower, technical, and procedural steps needed to ensure that safe, reliable, and incident-free operation is achieved at the Tengiz Field in Kazakhstan.

Lecture 9: Prediction of Subsynchronous Rotor Vibration Amplitude Caused by Rotating Stall

Wednesday, September 10, 10:30-12:00 General Assembly Theater C

Presenters:
Masayuki Kita, Shinji Iwamoto, Daisuke Kiuchi, Katsuya Yamashita, Mitsubishi Heavy Industries, Ltd., Hiroshima, Japan, and Rinpei Kawashita, Mitsubishi Heavy Industries, Ltd., Hyougo, Japan

The operating ranges of compressors are restricted by the rotating stall, because it may cause the severe subsynchronous vibration of the rotor. The purpose of this paper is to establish the prediction way of subsynchronous rotor vibration level by the rotating stall at the design stage of the centrifugal compressors.

Lecture 10: Life Cycle Assessment of Turbomachinery for Offshore Applications -- Updated with Field Data

Wednesday, September 10, 11:15-12:00 General Assembly Theater C

Presenters:
Marcelo Accorsi Miranda, Petr�leo Brasileiro S.A. (PETROBRAS), Niteroi, Brazil, and Orlando Guerreiro Meira, Petr�leo Brasileiro S.A. (PETROBRAS), Rio de Janeiro, Brazil

This paper describes an updated life cycle evaluation regarding power generation and main compressor drivers for the offshore oil and gas production platforms. The authors present operation data collected at the new generation platforms, with electric driven centrifugal compressors compared with the old generation platforms, with turbine driven compressors, in operation in the same offshore province.

Lecture 11: A DNV Modeled Qualification Process for a Turbocompressor Incorporating a Rotary Separator Known as the Integrated Compression System

Wednesday, September 10, 2:00-2:45 General Assembly Theater C

Presenters:
Gocha Chochua, Jose Gilarranz, H. Allan Kidd, and William Maier, Dresser-Rand Co., Olean, New York

Lecture 12: Dynamic Instabilities in Industrial Compression Systems with Centrifugal Compressors

Wednesday, September 10, 2:45-3:30 General Assembly Theater C

Presenters:
Kamal K. Botros, Nova Chemicals Corporation, Calgary, Alberta, Canada, and Subramaniam T. Ganesan, Bantrel Co., Calgary, Alberta, Canada

This paper discusses the concept of dynamic stabilities in compression systems involving complex piping geometries. Techniques and methods of determining whether a certain design or an operating mode will lead to instabilities are also formulated and solved. A notion of a dimensionless inertia number is derived with a threshold value below which a given design is prone to instability.