angle of incidence

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an·gle of in·ci·dence

1. the angle that a ray entering a refracting medium makes with a line drawn perpendicular to the surface of this medium;
2. the angle that a ray striking a reflecting surface makes with a line perpendicular to this surface.
Synonym(s): incident angle

an·gle of in·ci·dence

(anggĕl insi-dĕns)
1. Angle that a ray entering a refracting medium makes with a line drawn perpendicular to the surface of this medium;
2. Angle that a ray striking a reflecting surface makes with a line perpendicular to this surface.
Synonym(s): incident angle.
References in periodicals archive ?
5) was chosen, as it has the ability to maintain zero floatation when the angle of attack is at zero.
The [c.sub.lmax] and the [c.sub.d] at high angle of attack zones are better predicted by the k-[omega] SST.
Among these variables, p, q, and r are the rate of roll angle, pitch rate, and yaw rate, respectively; [alpha], [beta], and [mu] are the angle of attack, sideslip, and roll, respectively; V, X, and [gamma] are velocity, the angle of yaw, and trajectory inclination, respectively; X, Y, and Z are the projection of UAV's centroid on the ground coordinate system.
Specific modes that were used for the analysis of the phenomena of hysteresis are shown in figure 1, where [i.sub.cr] is a critical angle of attack that is characterised by sharp changes in the pressure profile on the blade back, [i.sub.0] is angle of attack that is characterised by correlation of normal and separated performance and is determined by coincidence of the pressure profile of the pressure distribution on the blade back at normal and separated characteristics, [bar.i'] = i'/[i.sub.KP] is a parameter of inability to calculate the flow performances by the angle of attack (at i' > [i'.sub.KP]), and [i.sub.0] = [i.sub.0]/[i.sub.KP] is a parameter of inability to calculate (at [i.sub.0] < [i.sub.KP]).
In order to accomplish this, the following output variables are studied: The lift curve slope (m = [dC.sub.l]/d[alpha]), angle of zero lift ([alpha]@[C.sub.lo]), maximum lift coefficient ([C.sub.l max]), critical angle of attack ([alpha]@[C.sub.l max]), maximum lift to drag ratio ([L/D.sub.max]), angle of maximum lift to drag ratio ([alpha]@[L/D.sub.max]), minimum drag coefficient ([C.sub.d min]), and quarter chord moment coefficient at zero lift ([C.sub.mo]).
To keep the exit bulk temperature 0.85 while the fluid is flowing at Reynolds number 100, the required length of the exchanger without any vortex generator is 7.78492, which is 35.77 % more than the required length of the exchanger having inline rectangular wings at an angle of attack of 26[degrees].
It is possible to notice that the values of the [C.sub.D] increased with the angle of attack. Indeed, the maximum value of [C.sub.D] was produced at an angle of attack of 90[degrees], presenting a value of about 1.0 in the three models.
Angle of attack is the angle between the airflow far in front of the airfoil and the line connecting the leading edge of the airfoil to the training edge.
The big man ran over unopposed when Coventry intelligently switched their angle of attack.
A deceptive runner can juke and jive a would-be tackler right out of his socks if he can get that one-on-one, head-on angle of attack.
Philpott, who had taunted the Rovers defence all afternoon, changed his angle of attack to find Brabin on the edge of the box and his piledriver gave Jones no chance.