Search
CSV
RISFluid Dynamics of a Bistable Diverter Under Ultrasonic Excitation—Part I: Performance Characteristic
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper investigates an ultrasonically driven bistable fluidic diverter at inlet nozzle Mach numbers of up to Mn = 0.3 and operating pressure ratios of up to Pr = 1.1. Part I examines the switching characteristics with ...
On Dynamics of Acoustically Driven Bistable Fluidic Valves
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The dynamics of an actively controlled fluidic diverter with novel actuation method are presented. This bistable fluidic valve is based on the Coanda effect and is able to switch the main flow solely by means of acoustic ...
Novel Operating Mode of a Fluidic Oscillator
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Fluidic oscillators show promise for use in aerodynamic flow control applications, with many studies reporting oscillation frequencies in the 1–10 kHz range. Spyropoulos, “A Sonic Oscillator,” introduced a “sonic” oscillator ...
On the Effects of Optimal Implementation of Variable Rotor Speed and Power Management on Hybrid-Electric Rotorcraft
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The concept of variable rotor speed (VRS) has been recognized as an efficient means to improve rotorcraft operational performance and environmental impact, with electrification being a potential technology to further ...
Fluid Dynamics of a Bistable Diverter Under Ultrasonic Excitation—Part II: Flow Visualization and Fundamental Mechanisms
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The switching mechanism and underlying flow physics of an actively controlled fluidic device are investigated using both large eddy simulation (LES) and particle imaging velocimetry (PIV). The fluidic device considered ...
Experimental and Numerical Investigation of Annular Casing Impingement Arrays for Faster Casing Response
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The transient heat transfer facility (THTF) was developed to test full-scale high pressure compressor and turbine casing air systems using gas turbine engine representative secondary air system conditions. Transient casing ...
On the Real-Time Estimation of Disk Temperature Spatial Distributions in Aeroengines
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents a novel approach to real-time modeling of disk temperature distribution using proper orthogonal decomposition (POD). The method combines singular value decomposition (SVD) techniques with a series of ...
Design Exploration and Performance Assessment of Advanced Recuperated Hybrid-Electric Urban Air Mobility Rotorcraft
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The design of efficient, environmentally friendly, and quiet powerplant for rotorcraft architectures constitutes a key enabler for urban air mobility (UAM) application. This work focuses on the development and application ...
Design Methodology and Mission Assessment of Parallel Hybrid Electric Propulsion Systems
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An integrated engine cycle design methodology and mission assessment for parallel hybrid electric propulsion architectures are presented in this paper. The aircraft case study considered is inspired by Fokker 100, boosted ...
High Effectiveness Tip Cooling Using Inclined Slots
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The tip of the high-pressure turbine blade is critical for gas turbine performance. Hot gas leaking through the tip gap tends to oxidize and erode the blade while generating significant aerodynamic loss. Squealer tips are ...