AEROLAB
SCHLIEREN SYSTEM
The AEROLAB Schlieren System employs a conventional
double mirror system with the light source and knife edge offset
from the axis of the mirrors. Considerable flexibility is achieved
by mounting components on separate, adjustable floor stands. The
mirrors are parabolic first-surface mirrors of telescope quality
correct to within 1/4 wave length, aluminized and overcoated.
Custom bench top Schlieren System with 3 inch diameter mirrors
Custom bench top Schlieren System with 3 inch diameter mirrors
A complete Schlieren System
The shockwave off a model in an Aerolab Supersonic Tunnel
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Total pressure rake in a 6" supersonic tunnel at mach 2
2 D shock over a 20 degree wedge at mach 2
Referring
to the photograph, the two mirrors are shown at either side. The
mirror covers and the adjustment knobs in yaw are evident. Similar
knobs in the rear control the mirrors in pitch.
The light source
consists of a PEK high pressure mercury arc lamp with a 0.012
x 0.012 inch source and an average brightness of 140,000 candles
per square centimeter (about four times that of a BH-6 light source).
The lamp is supported in a well-ventilated housing with an adjustable
condensing lens barrel at the front. A special DC power supply
is required for starting and running (shown on the base plate
of the unit) which is plugged into an ordinary 60 cycle 110 volt
AC outlet.
The knife-edge
assembly is adjustable in all three coordinate directions and
in angle of inclination. A universally mounted mirror at the end
of the assembly reflects the image to a convenient location for
the viewing screen. The viewing screen is constructed of translucent
plastic. The "standard" center line height is adjustable
from 54" to 58" from the floor. Other heights may be
specified at no additional cost.
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Typical layout of a Schlieren System
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