NDLI: Shrouding the First Blade of High Temperature Turbines

Please wait, while we are loading the content...

ANES/ASME Joint National Solar Energy Week

ASME Citrus Engineering Symposium

ASME India Oil and Gas Pipeline Conference

ASME International Mechanical Engineering Congress and Exposition

ASME International Pipeline Geotechnical Conference

ASME Power Conference

ASME Turbine Blade Tip Symposium

ASME 2013 Turbine Blade Tip Symposium(TBTS2013)

Optimizing the Tip Section Profiles of a Steam Turbine Blading

Direct Numerical Simulations of a Transonic Tip Flow With Free-Stream Disturbances

Effects of Blade Degradation on Turbine Performance

The Influence of Boundary Conditions on Tip Leakage Flow

Aerodynamic Optimization of Axial Turbine Tip Cavity With Approximation Model

Impact of Wall Temperature on Turbine Blade Tip Aero-Thermal Performance

Effects of Inlet Turbulence and End-Wall Boundary Layer on Aero-Thermal Performance of a Transonic Turbine Blade Tip

Aerothermal Performance of Shroudless Turbine Blade Tips With Effects of Relative Casing Motion

Numerical Study of Heat Transfer and Cooling Effectiveness on a Flat-Tip Turbine Blade

Effect of the Tip Clearance on End Wall Heat-Transfer in a HP Turbine

Measurement of Blade Tip Heat Transfer and Leakage Flow in a Turbine Cascade With a Multi-Cavity Squealer Tip

Shrouding the First Blade of High Temperature Turbines

An Experimental and Numerical Investigation Into the Effects of Squealer Blade Tip Modifications on Aerodynamic Performance

Building Up Suitable Contact Forces in Integrally Shrouded Blade Rows for Reducing Vibration Amplitudes

Vibration Analysis of Shrouded Turbine Blades for a 30 MW Gas Turbine

Effect of Common Blade Tip Squealer Designs in Terms of Tip Clearance Loss Control

Experimental and Unsteady Numerical Investigation of the Tip Clearance Noise of an Axial Fan

Leakage Flow Impact on High Aspect Ratio Steam Turbine Reaction Blades

Effect of Bending and Mushrooming Damages on Heat Transfer Characteristic in Labyrinth Seals

Advanced Coating Systems for Future Shroudless Turbines

Modeling Approach to Calculate Redistributions of HPT-Shroud Cooling Channels Minimizing Thermal Stresses Including Some Turbine Blade Tip Effects

Development of New Abradable/Abrasive Sealing Systems for Clearance Control in Gas Turbines

Turbine Split Rings Thermal Design Using Conjugate Numerical Simulation

Blade Tip Carving Effects on the Aero-Thermal Performance of a Transonic Turbine

Impact of Passive Tip-Injection on the Performance of Partially Shrouded Turbines: Basic Concept and Preliminary Results

Design Modification of a Passive Tip-Leakage Control Method for Axial Turbines: Linear Cascade Wind Tunnel Results

ASME/IEEE Joint Rail Conference

ASME/JSME Thermal Engineering Joint Conference

ASME/NRC Pump and Valve Symposium

ASME/USCG Workshop on Marine Technology and Standards

CANEUS: MNT for Aerospace Applications

Dynamic Systems and Control Conference

Energy Nanotechnology International Conference

Energy Sustainability

Engineering Systems Design and Analysis

Engineering Technology Conference on Energy

Fluid Power Systems Technology

Fluids Engineering Division Summer Meeting

Frontiers in Biomedical Devices

Gas Turbine India Conference

Global Congress on NanoEngineering for Medicine and Biology

Heat Transfer Summer Conference

High Temperature Reactor Technology

Information Storage and Processing Systems

Integrated Nanosystems: Design, Synthesis, and Applications

Internal Combustion Engine Division Fall Technical Conference

Internal Combustion Engine Division Spring Technical Conference

International Conference on Fluidized Bed Combustion

International Conference on Fuel Cell Science, Engineering and Technology

International Conference on Integration and Commercialization of Micro and Nanosystems

International Conference on Micro/Nanoscale Heat Transfer

International Conference on Nanochannels, Microchannels, and Minichannels

International Conference on Nuclear Engineering

International Conference on Offshore Mechanics and Arctic Engineering

International Conference on Radioactive Waste Management and Environmental Remediation

International Design Engineering Technical Conferences and Computers and Information in Engineering Conference

International Electronic Packaging Technical Conference and Exhibition

International Heat Transfer Conference

International Joint Power Generation Conference

International Joint Tribology Conference

International Manufacturing Science and Engineering Conference

International Pipeline Conference

International Solar Energy Conference

International Symposium on Flexible Automation

Multifunctional Nanocomposites and Nanomaterials International Conference

Noise Control and Acoustics Division Conference

North American Waste-to-Energy Conference

Pressure Technology

Pressure Vessels and Piping Conference

Rail Transportation Division Conference

Small Modular Reactors Symposium

Smart Materials, Adaptive Structures and Intelligent Systems

Summer Bioengineering Conference

Turbo Expo: Power for Land, Sea, and Air

Verification and Validation

Water Quality, Drought, Human Health and Engineering Conference

Wind Energy Symposium

World Conference on Innovative Virtual Reality

World Tribology Congress

Shrouding the First Blade of High Temperature Turbines

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Mamaev, B. I. Petukhovsky, M. M. Pozdnyakov, A. V.
Copyright Year	2013
Abstract	Blade shrouding gives an opportunity to increase the HPT (high pressure turbine) first stage efficiency by 2–3 %. However, if high gas temperature and high circumferential velocity are at the stage, shrouding can be problematic due to load increasing at blade/disk attachment and high temperature of the shroud itself. To make blade/disk attachment more reliable the shroud axial width has to be decreased by increasing a relative pitch of airfoil cascades t (t = t / b, where t – pitch, b – chord) at the blade tip span. According to experience for a flow with β1 = 50 – 85°, M2 = 0.8 – 1, and Re = (0.8 – 1)•106 high efficient cascades with t = 0.93 – 1.05 can be designed. Application of such a profiling for GTE (gas turbine engine) turbine is demonstrated here. In the turbine meridian flow path the blade was drastically tapered to the tip (tip width was 53 % of the mean width and 46 % of the hub width). To lighten the blade a partial shrouding can be also applied. Model turbine tests showed that local cuts at the front shroud area and the aft shroud area at the airfoil pressure side influenced the efficiency weakly. Required shroud temperature is provided with a cooling. The aircraft turbine with a governed cooling system and a radial clearance control is an example here. In this case the shroud had 3 labyrinth ribs. The shrouding decreased radial clearance by 0.8 mm at main design modes that increased efficiency by ∼ 1.5 %. To cool down the shroud the air downstream the compressor was fed into the cavity behind the front labyrinth rib. At maximal mode with full cooling the relative coolant mass flow (to the compressor mass flow) was mc = 1.3 % and gas leakages through the labyrinth were 0.2 %. It gave acceptable mixed temperature of 530°C in the cavity over the shroud. At cruise high altitude mode and a lower gas temperature and partial cooling with mc = 0.4 % and gas leakages of 0.1 % the mixed temperature also did not exceed 530°C over the shroud. The assessment with taking into account changes of the clearance, the coolant mass flow, and gas leakages showed that the shrouding provided the engine economy improvement by 0.7 – 0.9 % for both modes. For GTPU (gas turbine power unit) the first blade shrouding can be more complicated. However, even the slight turbine efficiency increase provides considerable profits due to GTPU huge power output and long term running. So, when GTE and GTPU designing starts, it is reasonable to consider the turbine first blade shrouding. Here the integral evaluation criterion, which includes the assessment of a possible income from the unit full life cycle running, has to be applied.
Sponsorship	International Gas Turbine Institute
File Format	PDF
ISBN	9780791856079
DOI	10.1115/TBTS2013-2001
Conference Proceedings	ASME 2013 Turbine Blade Tip Symposium
Language	English
Publisher Date	2013-09-30
Publisher Place	Hamburg, Germany
Access Restriction	Subscribed
Subject Keyword	Leakage Economics Cycles Temperature Cooling Blades Clearances (engineering) Airfoils Cooling systems Compressors High temperature Flow (dynamics) Pressure Engines Stress Design Cavities High pressure (physics) Gas turbines Chords (trusses) Coolants Disks Aircraft Turbines
Content Type	Text
Resource Type	Article

Central Library (ISO-9001:2015 Certified)
Indian Institute of Technology Kharagpur
Kharagpur, West Bengal, India | PIN - 721302

See location in the Map
03222 282435
Mail: support@ndl.gov.in

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in