subsonic flow

subsonic flow

[¦səb′sän·ik ′flō]
(fluid mechanics)
Flow of a fluid at a speed less than that of the speed of sound in the fluid. Also known as subcritical flow.
References in periodicals archive ?
Allan and Owens conducted validation of NASA developed RANS flow solver OverFlow for a boundary layer ingesting intake in high subsonic flow regime with passive and active flow control devices [17].
The model will be investigated in a subsonic flow with [Ma.sub.[infinity]] = 06 and the motion of the airfoil will be limited to the pitching motion described as (11) at [[alpha].sub.0] = 3 deg.
The boundary conditions in CFX-Pre were as follows: a) the air speed was applied to the input area with the lateral curtains with a subsonic flow regime and normal velocity of 0.5 m [s.sup.-1], which is the minimum allowed; b) the air speed was applied to the outlet area of the poultry house with a subsonic flow regime and average static pressure of 0 Pa; c) the heat flux generated by the chicks ([Q.sub.ct]) was found in function of the environmental temperature of the building (T) and body weight ([m.sub.kg]).
This is done to avoid flow stagnation due to restriction and obtaining supersonic conditions (Ma>1), the higher separation of 0.8 mm is assumed to obtain in the simulation a subsonic flow and, thus, evaluate the device's performance under different flow regimes.
The method is applied to BesselAEs functions, Navier-Stokes equations in Cartesian and cylindrical polar coordinates, blood flow through arteries, subsonic flow past a wavy wall, steady transonic flow, LaplaceAEs equation for a circular disc, and flow near a rotating disc in a fluid at rest.
This happens because the subsonic flow in Rampressor inlet is easily affected by the external excitation.
The hypersonic boundary layer stability characteristic is rather different from the boundary layer stability characteristic of incompressible flow, subsonic flow, and low Mach number supersonic flow.
Cesnik, "Nonlinear Aeroelastic Anaylsis of Complete Aircraft in Subsonic Flow," Journal of Aircraft 37, no.
(4) Professor, Women's College, Gulbarga, India Table 1: Analogous quantities of classical hydraulic analogy 2D gas flow Free Surface incompressible water flow Temperature ratio T/T0 Hydraulic depth ratio h/h0 Density ratio Hydraulic depth ratio h/h0 Pressure ratio P/P0 Sq of hydraulic depths ratio (h/h0)2 Sound Velocity a0 Wave Velocity _(gh) Mach number V/ a0 Froude number V/_(gh) Velocity ratio V/Vmax Velocity ratio V/ Vmax Subsonic flow M<1 Streaming Water flow Fr<1 Supersonic flow M>1 Shooting Water Flow Fr>1 Compressible shock Hydraulic jump
Ryan Carelli, "Rocket Stability in Subsonic Flow," third place.
Based on subsonic flow in gas dynamics, the pressure must be increased from the outlet due to the rapid increase in the flow area.
In both cases, the vortex passes the inlet without breakdown (for subsonic flow) but a second-order discretization algorithm results in higher vortex resolution and details.