Schlieren instrument for measurement of the density gradient along the blade straight direction.Grain alcohol lamp shadow instrument observation of the test be of flame temperature field.Approximate because we think that is a constant pressure in a flame of fire, and the temperature T is proportional to the density of rho.With the schlieren instrument can also measure the flame temperature field.Now grain shadow instrument measured temperature gradient is the direction of the straight edge.The test processA) first of all should brush up on your handout about the introduction of the principle of schlieren method.B) device good grain shadow meter two spherical mirrors M1 and M2, concluded that the light source S orientation, should make light source S in the sphereThe focus of the mirror M1 (spherical reflector focal length is 1. 5 meters, diameter is 200 mm).C) adjust the spherical mirror M2, find the light source S as I.Because the focal length of the M1 and M2 are the same, so S toThe interval of M1 should be equal to the I to the interval of M2.If, should repeat adjustment S location.D) device CCD and computer is accurate, cohesion and connected to the power supply, open LIVE3000 application software, can be in the meterComputer monitor survey to view images.E) device in light of the incision as I place, adjust the blade, cutting of the light source as I.When the focus of blade K in M2, adjust the blade K, on the computer monitor should survey to view images of uniform brightness changes.Changes if the field is not uniform, but from one side to the dark or bright, clarify the orientation of the blade K is not correct.F) put the alcohol lamp light path midpoint, adjust the focal length of the CCD, the image is clear.Change the orientation of the blade and the partyTo investigate the image difference.Can use computer to collect video or a single image. |
