Results 21 to 30 of about 4,317 (244)
Novel high-pressure turbine purge control features for increased stage efficiency
Journal of the Global Power and Propulsion Society, 2017 Rim seals throttle flow and have shown to impact the aerodynamic performance of gas turbines. The results of an experimental investigation of a rim seal exit geometry variation and its impact on the high-pressure turbine flow field are presented.
Rainer Schädler +5 more
doaj +1 more source
Flow and Ingestion in a Turbine Disc Cavity under Rotationally-Dominated Conditions
International Journal of Turbomachinery, Propulsion and Power, 2021 An investigation of hot gas ingestion driven by the disc pumping effect in a chute seal was conducted at the Oxford Rotor Facility. Measurements of mean pressure, unsteady pressure and gas concentration have been logged and analysed under different ...
Anna Bru Revert +2 more
doaj +1 more source
Aerodynamics and Sealing Performance of the Downstream Hub Rim Seal in a High-Pressure Turbine Stage
International Journal of Turbomachinery, Propulsion and Power, 2023 The purpose of the paper is to characterize the aerodynamic behavior of a rotor-downstream hub cavity rim seal in a high-pressure turbine (HPT) stage.
Filippo Merli +4 more
doaj +1 more source
Rim Sealing of Rotor-Stator Wheelspaces in the Presence of External Flow [PDF]
Volume 1: Turbomachinery, 1991 Sealing of the cavity formed between a rotating disc and a stator with an asymmetric external flow is considered. In these circumstances circumferential pressure variations in the external flow and the pumping action of the disc may draw fluid into the cavity.
CHEW, JW, DADKHAH, S, TURNER, AB
openaire +5 more sources
International Journal of Turbomachinery, Propulsion and Power, 2023 The efficiency assessment of a high-pressure turbine (HPT) stage is complicated by the presence of upstream and downstream purge flows. In fact, the efficiency calculation is often based on mass flow-averaged values of total temperature at the stage ...
Filippo Merli +3 more
doaj +1 more source
Archaeometry, EarlyView., 2022 Abstract Organic residue analysis was conducted on various vessels from burials at Tel Yehud, Israel. The analyses led to new reliable evidence for the presence of opioid alkaloids and their decomposition products. This research revitalizes a decades‐old discussion on the presence and function of the opium trade across a cultural region of utmost ...
Vanessa Linares +5 more
wiley +1 more source
Numerical study of turbine rim seals performance with different sealing structures
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, 2022 The unsteady large-scale vortex near the turbine rim has an important influence on the sealing performance. Characteristics and performance of four sealing structures are researched in this paper. Three-dimensional unsteady numerical simulation was adopted to deeply reveal the characteristics of the rim sealing vortex and its influence mechanism on the
T. Bai, Q. Yang, J. Liu, Y. Shi, S. Qiao
openaire +1 more source
Flow characteristics in turbine wheel space cavity
Energy Reports, 2021 Unsteady flow structures unrelated to rotating frequency in the turbine wheel space cavity has been observed and reported in a number of recent rim sealing investigations.
Lei Xie +4 more
doaj +1 more source
Fluid-dynamics of Turbine Rim Seal Structures:A physical Interpretation Using URANS [PDF]
, 2023 Unsteady Reynolds-averaged Navier-Stokes modeling (URANS) is a valuable and costeffective tool for computational fluid dynamics (CFD), including the investigation of mainstream-cavity interaction in turbines. Despite the gap in accuracy with higher order
De Cosmo, Giove +4 more
core +2 more sources
A Comparison of Single and Double Lip Rim Seal Geometries
, 2017 The effect of the purge flow, engine-like blade pressure field, and mainstream flow coefficient are studied experimentally for a single and double lip rim seal.
Sumiu Uchida +2 more
core +2 more sources