A thorough understanding of the role of the axial turbine component is important to those involved in the design or performance assessment of gas turbine engines. Read more Read less
In particular, modern concurrent engineering practices demand a thorough appreciation of the interaction between aerodynamics, blade cooling and mechanical integrity requirements. In addition, the engineer must understand the compromises and limitations imposed on the axial turbine design and performance by the device it is driving, the compressor or the external load.
At a glance
- Duration5 days
- LocationCranfield campus
- Cost£1,710 The course fee includes refreshments and lunch during the day. Accommodation is not included and must be booked separately. Concessions available
Course structureThis five day course is presented through a mixture of lectures, tutorials and worked examples. Printed course material is provided for delegates use during and after the course. Active participation from the delegates is strongly encouraged particularly during the worked examples in order to consolidate learning. All delegates will receive a Certificate of Attendance upon completion of this course.
What you will learn
On completion of the course, you should be able to:
- select an appropriate shape and geometry for the axial turbine annulus diagram.
- select the number of stages needed for a given overall power requirement according to engine application.
- assess the design interactions between aerodynamic, mechanical integrity and blade cooling requirements.
- undertake preliminary design optimisation for both high pressure and low pressure turbines.
Introduction to gas dynamics and the role of the turbine within the engine. Selection of overall annulus geometry and layout.
Axial Turbine Aerodynamics
- Turbine design parameters e.g. stage loading, flow coefficient, specific work, reaction. Aerodynamic design choices, velocity triangles, number of blades, lilft coefficients, aspect ratio and pitch spacing. Estimates for turbine efficiency. Secondary flows and overtip leakage
- Hub to casing three-dimensional design aspects and choice of vortex flow. Limitations of hub-tip ratio
- Axial turbine blading and limitations due to cooling and manufacturing considerations.
Choice of stage loading and flow coefficients according to engine role and overall performance requirements. The overall turbine performance characteristic.
Basic stress loads, thermal stresses, multi-axial deformation and failure criteria. Characteristics of failure modes. Creep and life prediction. Vibrations and vibration criteria for design.
Turbine Design Example
A complete hand worked high pressure axial turbine aerodynamic design is carried out for both low and high turbine entry temperature cases to represent industrial and aeronautical applications, respectively. This is a fully interactive session involving extensive use of Q-curves. The results are analysed and discussed. A downstream low pressure turbine design solution is reviewed and a computer based assessment of the design solution is reviewed and a computer based assessment of the design is performed to consider the matching of the HP/LP turbine combination.
Review of heat transfer principles and physical significance of non-dimensional groupings. Blade row boundary layers, external heat transfer coefficient distribution, effect of turbulence. Root cooled blades and NGVs, analytical and numerical methods of determining spanwise temperature distribution. Cooling efficiency, effectiveness and mass flow function: application at project design stage for determining metal and cooling air temperatures. Methods for optimising. Relative performance of convection, impingement, film, transpiration and liquid cooling.
Who should attend
The course is structured to provide design and performance expertise for graduates or equivalent who will be closely involved in axial turbine design in the gas turbine manufacturing industry. The course is also ideally structured to suit the needs of graduate trainees whose final specialisation will require a good understanding of the role of the axial turbine in the gas turbine engine.
The course will also be of value to experienced engineers in the manufacture or user industries who have a need for a detailed overview of axial turbine design and performance.
The course is presented through lectures and tutorials conducted by members of Cranfield University’s staff all of whom have considerable academic and industrial experience. Additional lectures will be presented by senior engineers from industry.
ConcessionsWhere more than five delegates are booking from within one site of one organisation, a discount of 10% will apply to the invoice for the course tuition fee. Accommodation fees are not included in the discount scheme at time of booking.
Accommodation options and prices
Accommodation is available at Mitchell Hall which is located on campus. All rooms are en-suite and bookings are on a half-board basis from Sunday to Friday. If you would like to book accommodation for this short course at Mitchell Hall, please indicate this on the registration form and we will arrange this for you.
Alternatively, you may wish to make your own arrangements at a nearby hotel.
Location and travel
Cranfield University is situated in Bedfordshire close to the border with Buckinghamshire. The University is located almost midway between the towns of Bedford and Milton Keynes and is conveniently situated between junctions 13 and 14 of the M1.
London Luton, Stansted and Heathrow airports are 30, 90 and 90 minutes respectively by car, offering superb connections to and from just about anywhere in the world.For further location and travel details
Location addressCranfield University
Read our Professional development (CPD) booking conditions.