DIAD GROUP

Aeronautic and automotive turbines are normally manufactured starting from high quality casts using 5 axis milling processes. The machining requires precise machines and accurate CN control, to obtain complex shape parts. The materials range from light alloys in the automotive compressor, to steel and finally superalloys (like Inconel
718) for the hot part of aero engines.

 

The turbo charger for automotive application exploits the energy of the exhaust gas to make turning a disk turbine connected with a disk compressor that force the fresh air in the cylinder chamber. The amount of fuel that can be burned per cycle increase proportionally with the increase of the air molecules available in the combustion chamber, leading to an obvious increase of energy generated during the combustion process, as so the power accordingly.


The aeronautic turbine turbines develop torque by reacting to the gas or fluid's pressure or mass. The pressure of the gas or fluid changes as it passes through the turbine rotor blades. A pressure casement is needed to contain the working fluid as it acts on the turbine stage or the turbine must be fully immersed in the fluid flow (such
as with wind turbines).


The Vibration Problem

Resonant vibrations of turbine blades requires thicker and aerodynamically lower performing blade designs, increasing the engine weight and the inertia of rotating parts, leading to higher fuel consumption. High performance rotating blades are subject to high cycle fatigue (HCF) limitations as a result of high vibratory stresses. A better damping of the turbine and compressor blisks could lead to 20% lighter parts, reducing the inertia of the same amount and so reducing all the negative effects of the turbo lag.


The total market size for automotive turbos is 24 millions units in 2013. There is an expectation that by 2014, half of all turbocharged engines will have a displacement of 1.7 litres or less due to the current downsizing policies. That means that practically all the cars on the market will have downsized engines equipped with turbo.
It is important to notice that practically all the 2, 3 and 4 cylinder engines will be equipped with turbo. Moreover in India, China and Korea, the diesel market will grow significantly. So this area of the world, specifically in China, is a very important area for continuous growth of turbo diffusion.


DIAD Group expects an increase of 34% in the company turnover 3-5 years after the project end (due to automotive applications) and an increase of 45% in the company turnover 7 years after the project end (due to the application of the technology to the aeronautical sector).