Cross flow instability
WebJun 22, 2015 · Abstract Compared to the streamwise instability, the cross-flow instability in high-enthalpy flows has received relatively less attention, but the latter is of vital … WebApr 14, 2024 · The merged streamwise vortex instability region and the cross-flow instability region of the shoulder cross-flow and vortex region are connected at their tail, and a distinct boundary can be observed. Moreover, the crescent-shape vortex at the head of the upper streamwise vortex instability region at 7° angle of attack is wider and flatter ...
Cross flow instability
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WebThe primary instability is conditioned by the external forcing either in the wavenumber spectrum (by inducing selected spanwise modes) or in intensity (by weakening or … WebApr 11, 2024 · Figure 4. The mechanism responsible for the initiating radius. (a) We show the cross sections A − A ′ in the stable region (r < r init) and B − B ′ in the unstable area (r > r init) for Fig. 2. (b) As r < r init, the radial flow rate is so large that the advection in the horizontal direction dominates the dissolution process over the transport in the vertical …
WebDec 13, 2010 · 1. Introduction 2. Prisms in cross-flow - galloping 3. Vortex-induced vibration and lock-in 4. Wake-induced instabilities of pairs and small groups of cylinders 5. Fluidelastic instabilities in cylinder arrays 6. Ovalling instabilities of shells in cross-flow 7. Rain and wind induced vibrations.
WebTo provide further insight into the instability dynamics of the secondary instability modes in the hypersonic three-dimensional boundary layer flows, a balance analysis of the … WebOct 27, 2016 · The crossflow instability in a hypersonic, laminar boundary layer is investigated using point measurements inside the boundary layer for the first time. …
WebMar 10, 2024 · The interaction between the electrohydrodynamic instability and an imposed flow is studied. The imposed flow distorts the concentration field causing a sheltering effect which hinders the ion transport from low to high concentration regions, and therefore suppresses the electroconvective instability below a certain wavenumber. The removal …
WebApr 7, 2024 · Figure 1 (a) depicts the geometric configuration of a flexible spinning cantilevered pipe conveying incompressible flow. The cross-section of the considered … charge g b hWebAbstract. The crossflow instability in a hypersonic, laminar boundary layer is investigated using point measurements inside the boundary layer for the first time. Experiments are performed on a 7° right, circular cone with an adiabatic wall condition at 5.6° angle of incidence in the low-disturbance Mach 6 Quiet Tunnel at Texas A&M University. harris county license plate appointmentWebNov 1, 1989 · AbstractAn extensive experimental program was carried out to study the vibration behavior of tube bundles subjected to two-phase cross-flow. Fluid-elastic instability is discussed in Part 2 of this series of three papers. Four tube bundle configurations were subjected to increasing flow up to the onset of fluid-elastic … harris county lift fund grantWebThis area allowed acquisition of approximately five wavelengths of the stationary cross-flow instability in a single frame, while still acquiring approximately 30 points (using 75 % … charge garmin watchWebFig. 5 Sketch of stationary cross-flow waves in the swept wing boundary layer Fig. 6 Naphthalene sprayed on the entire upper surface of the model in LTWT 4 Results 4.1 Results in LTWT According to the pressure measurement, the angle of attack of -4° is selected for the cross-flow instability investigation. Fig. 7 shows the harris county license plateWebJan 3, 2024 · First, the circumstances in which the cross-flow instability can be designated as a mode are unknown, despite that the term cross-flow mode has been widely used in … harris county lincoln reagan dinnerWebFeb 1, 2024 · 1. Introduction. The tube bundles of steam generators are subjected to several types of flow induced vibrations. Especially, when the cross flow reaches a certain critical velocity, the fluid-elastic forces may result in fluid-elastic instability, which may eventually lead to steam generator safety issues and substantial standstill costs due to unplanned … harris county library lone star college