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Experimentally and numerically driven optimization of high performance instrumentation for real engine testing

PhD member: Aude Lahalle

Instrumentation has a crucial role at every step of the development process of new components: it provides valuable information during the design phase and confidence on the achieved performance right before the certification.

Such key role is therefore justifying the resources allocated by the engines manufacturers to constantly and precisely calibrate their measurement tools, a very costly and time consuming procedure which could account up to the 50% of the instrumentation’s cost and production time. Considering in the end how heavily instrumented modern engines are, then the instrumentation cost definitely becomes an important budget item in the development of a new product.

By means of a UQ-like approach, the main geometrical parameters affecting the probe’s recovery factor (in temperature and pressure) will be identified and the modelling of the phenomena attempted through highly reliable numerical simulations. At its final extent, the present PhD thesis aims at making use of the aforementioned information in order to provide a solid and reliable design strategy, able to control and enhance the recovery factor of total temperature and pressure probes.

(left) numerical domain; (centre) Mach number contours in calibration; (right) flow-field between heads
(left) VKI colled fast-response pressure probe; (right) VKI triple hot-wire