Pulsed Flow Turbine Design Recommendations

Abstract

A preliminary analysis of turbine design, fit for pulsed flow, is proposed in this paper. It focuses on an academic 2D configuration using inviscid flows, since pressure loads due to wave propagation are several orders of magnitude higher than friction and viscous effects do not significantly impinge on the inviscid part, as previously shown by Hermet, 2021. As such, a large parametric study was carried out using the design of experiments methodology. A performance indicator adapted to unsteady environment is carefully defined before detailing the factors chosen for the design of experiments. Since the number of factors is substantial, a screening design to identify the factors influence on the output is first established. The non-influential factors are then omitted in a more quantitative study of the output law. The surface response calculation allows determining the factor level favouring the best output. Consequently, the main trends in the turbine design driven by a pulsed flow can be stated.

Physics of the Unsteady Response of Turbine Cascade to Pulsed Flow Conditions

“…The non-conformal and sliding interface, which results from the relative movement between the rotor and stator domains, is treated using a sliding mesh method developed by [10]. The code has been validated on similar cases (pulsed flow) by [11,12] but also by [13]. The mesh is composed of 163,980 cells and a mesh convergence has been performed to ensure good quality and reliability of the simulations.…”

Designing Mesh Turbomachinery with the Development of Euler’s Ideas and Investigating Flow Distribution Characteristics

“…Research has intensified in the field of using hydrogen fuel [80], and detonation engines [81]. Turbine designs suitable for impulse flow [82] and energy recovery [83,84] have been analyzed. The issue of non-stationary mixing of various fluid media is considered [85,86].…”