BSA Flow Software Installation and User's Guide - CSI

More documents

Recommendations

Info

Typical seeding materials for use in air flows are: Material Particle Diameter [µm] Comments Al2O3 < 8 Generated by fluidisation. Useful for seeding flames on account of a high melting point. Glycerine 0.1 - 5 Usually generated using an atomiser. Silicone oil 1 - 3 Very satisfactory. SiO2 Particles 1 - 5 Spherical particles with a very narrow size distribution. Better light scatterer than TiO2, but not as good as glycerine. TiO2 Powder From submicron to tens of microns Good light scatterer and stable in flames up to 2500°C. Very wide size distribution and lumped particle shapes. Water 1 - 2 Generated by atomisation. Evaporation inhibitor must be added. MgO Generated by combustion of magnesium powder giving a dirty unsteady supply of seeding. Typical seeding materials for use in water flows are: Material Particle Diameter [µm] Aluminium powder Comments < 10 Preserves polarisation by scattering. Bubbles 5 - 500 Can only be used if two-phase flow is acceptable. Glass balloons 10 - 150 Cheap even in large volumes, but with a large spread in particle size. Latex beads 0.5 - 90 Can be delivered with relatively narrow size distribution, but quite expensive. Milk 0.3 - 3 Cheap and efficient. Pine Pollen 30 - 50 Egg-shaped and swell somewhat after some time in water. Can be supplied in large volumes. References F. Durst, A. Melling & J. H. Whitelaw: “Principles and practice of laserdoppler anemometry”, second edition, Academic Press, 1981. H. C. van de Hulst: “Light Scattering by Small Particles”, Dover publications, 1981 7-20 BSA Flow Software: Reference guide
7.2 Theory of Phase Doppler Anemometry 7.2.1 Basic principles of phase Doppler anemometry Phase Doppler anemometry (PDA), which is used in Dantec’s conventional PDA and DualPDA systems, is an extension of Laser Doppler Anemometry (LDA, see chapter 7.1). This extension to conventional Phase Doppler Anemometry and further to the concept of the DualPDA is discussed in this chapter. In the LDA system (see chapter 7.1) there was only one photo-detector. If we consider the situation in Figure 7-14, we see two photo-detectors receiving light scattered from the surface of a reflecting spherical particle similar to that we observe in LDA The point to note here is that the difference in optical path length for the reflections from the two incident beams changes with the position of the photo-detector. This means that, when the particle passes through the measuring volume, both photo-detectors receive a Doppler burst of the same frequency, but the phases of the two bursts vary with the angular position of the detectors. This phenomenon was first utilized as an indication of the size of a particle by Durst & Zaré, who presented their paper Laser Doppler Measurements in Two-Phase Flows in 1975. Again it is convenient to introduce the fringe model as a first order of approximation. Figure 7-14 The interference patterns differ at the two photo-detector surfaces Figure 7-15 illustrates the intensity fluctuation in each of the photodetectors and the time lag, ∆t, separating the wave fronts reaching the two photodetectors. The corresponding phase difference would be: BSA Flow Software:Reference guide 7-21
Page 1 and 2:
BSA Flow Software Version 4.10 Inst
Page 3 and 4:
1. General 1.1 Table of Contents 1.
Page 5 and 6:
5.5 Optical Calibrated LDA System p
Page 7 and 8:
7.2.1 Basic principles of phase Dop
Page 9 and 10:
1.2 Dantec Dynamics Licence Agreeme
Page 11 and 12:
1.3 Laser safety All equipment usin
Page 13 and 14:
2. Introduction Congratulations wit
Page 15 and 16:
2.1.9 Analog Monitor Option 2.1.10
Page 17 and 18:
2.3.4 Trouble shooting 2.3.5 On-lin
Page 19 and 20:
3. Installation 3.1 General 3.1.1 P
Page 21 and 22:
Directory structure CPU usage will
Page 23 and 24:
3.2.2 Installation as administrator
Page 25 and 26:
You have the possibility to define
Page 27 and 28:
Click Next and select the add-ons y
Page 29 and 30:
Peer-to-peer connection Processor s
Page 31 and 32:
Click on the Download tab to get th
Page 33 and 34:
The BSA processor will restart. Thi
Page 35 and 36:
• If the Game controller needs to
Page 37 and 38:
Figure 3-2 National Instruments Mea
Page 39 and 40:
3.7 Third party traverse system To
Page 41 and 42:
4. The user interface 4.1 Layout Me
Page 43 and 44:
4. If the mouse pointer was in the
Page 45 and 46:
4.3 Project explorer shortcuts to t
Page 47 and 48:
Figure 4-5 Dialog for adding object
Page 49 and 50:
Using Templates To make a Template,
Page 51 and 52:
4.6 The tool bar Figure 4-6 the pro
Page 53 and 54:
Save As... Figure 4-10 the File men
Page 55 and 56:
Figure 4-11 Save As compressed proj
Page 57 and 58:
Figure 4-14 the Properties - Summar
Page 59 and 60:
Figure 4-18 The Select Position dia
Page 61 and 62:
Options With the Options you get a
Page 63 and 64:
When Enable error logging is checke
Page 65 and 66:
The fourth format, Significant Digi
Page 67 and 68:
The PDA Optical Configuration objec
Page 69 and 70:
4.7.7 Help menu Figure 4-34 The Hel
Page 71 and 72:
4.9 Message window • by clicking
Page 73 and 74:
PM and Bragg cell connections Warni
Page 75 and 76:
LDA and PDA transmitting optics The
Page 77 and 78:
Click on OK. Note For fully opaque
Page 79 and 80:
In the third step, the software con
Page 81 and 82:
Lightweight Traverse with handbox C
Page 83 and 84:
57G15 Traverse interface Third part
Page 85 and 86:
• right-click the Traverse Server
Page 87 and 88:
4. This brings up the following dia
Page 89 and 90:
To change a setting, click in the V
Page 91 and 92:
Figure 4-39 System monitor in auto-
Page 93 and 94:
14. You have now completed data acq
Page 95 and 96:
4. Check the Show System Monitor wh
Page 97 and 98:
. 8. LDA 1 properties are specific
Page 99 and 100:
11. To monitor the Doppler signals,
Page 101 and 102:
The axes will automatically rescale
Page 103 and 104:
Click Acquire. If a complete new re
Page 105 and 106:
Define the positions that you want
Page 107 and 108:
Select the type of the files to ope
Page 109 and 110:
5. Project explorer objects 5.1 Sta
Page 111 and 112:
Browse to the file you wish to impo
Page 113 and 114:
For each column, the data type must
Page 115 and 116:
5.3.1 Output properties Figure 5-4
Page 117 and 118:
Figure 5-7 The Custom… dialog und
Page 119 and 120:
Figure 5-8 BSA F/P 30: processor pr
Page 121 and 122:
Max. acquisition time: The maximum
Page 123 and 124:
Normal user interface Advanced user
Page 125 and 126:
Figure 5-11 The Bragg cell connecto
Page 127 and 128:
LDA 1, 2, . properties: Range and g
Page 129 and 130:
5.3.4 System monitor It frequently
Page 131 and 132:
Scope: Burst spectrum display Recor
Page 133 and 134:
Overlaid Graphs: used to show the b
Page 135 and 136:
Uncheck the Use default bindings bo
Page 137 and 138:
The calibration data are stored in
Page 139 and 140:
5.6.1 PDA beam system The Beam syst
Page 141 and 142:
Figure 5-24: Fringe direction setti
Page 143 and 144:
5.6.4 Medium properties Medium name
Page 145 and 146:
Software max. limit in mm.: Self ex
Page 147 and 148:
The default address of the National
Page 149 and 150:
Traverse coordinates of a datum poi
Page 151 and 152:
5.7.8 Traverse Mesh generator If yo
Page 153 and 154:
Regions Figure 5-39 Motion pattern,
Page 155 and 156:
Warning Please observe strict secur
Page 157 and 158:
5.9 Export Figure 5-40 Data-sources
Page 159 and 160:
If multiple positions are exported
Page 161 and 162:
5.9.3 Selected columns 5.9.4 Binary
Page 163 and 164:
Data C Headers Programming Examples
Page 165 and 166:
char filename[256] = {0}; strcpy(fi
Page 167 and 168:
Range means that the filter will ap
Page 169 and 170:
5.11.1 Data Properties Note that th
Page 171 and 172:
Figure 5-54. Size histogram (left)
Page 173 and 174:
Figure 5-57. Velocity distribution
Page 175 and 176:
Figure 5-58 list output of 1D PDA d
Page 177 and 178:
The next selection in the context m
Page 179 and 180:
5.13.2 Objects under Merge object A
Page 181 and 182:
N−1 Mean u ∑ ηiui = i= 0 N−1
Page 183 and 184:
Cross-moments The property Cross-mo
Page 185 and 186:
The calculation of ε fails if Umea
Page 187 and 188:
Figure 5-71 General properties of t
Page 189 and 190:
An alternative geometry of a 3D LDA
Page 191 and 192:
Figure 5-75: FiberPDA phase plot. A
Page 193 and 194:
5.16.3 Display properties The defau
Page 195 and 196:
The output quantities of the diamet
Page 197 and 198:
6. Options and Add-ons This chapter
Page 199 and 200:
6.1 Advanced Graphics Add-on The ma
Page 201 and 202:
Figure 6-2 The Tools-Options-Output
Page 203 and 204:
Figure 6-5 Scale properties for 2D
Page 205 and 206:
Property group ‘Display’ Also t
Page 207 and 208:
6.1.3 2D Plot [m/s] 36 34 32 The 2D
Page 209 and 210:
6.1.4 2D Histogram For off-line use
Page 211 and 212:
Configuring the 2D Histogram The co
Page 213 and 214:
Configuring the 3D Plot Figure 6-21
Page 215 and 216:
Figure 6-23 “Interpolate bin” s
Page 217 and 218:
Property group ‘Data’ Figure 6-
Page 219 and 220:
Coordinate shown on Intercepts the
Page 221 and 222:
LDA1-Mean [m/ s] -2,00 -3,00 -4,00
Page 223 and 224:
Figure 6-32 Properties of the Vecto
Page 225 and 226:
Figure 6-33 shows a velocity vector
Page 227 and 228:
6.1.9 Exporting plots Copying a plo
Page 229 and 230:
6.2 Synchronisation Option 6.2.1 In
Page 231 and 232:
Pin Signal Pin Signal 1 Out 1 14 Gr
Page 233 and 234:
6.2.5 Sync. Output Signals properti
Page 235 and 236:
Outputs Figure 6-40 Differential sy
Page 237 and 238:
Figure 6-42 Cyclic phenomena in the
Page 239 and 240:
Cycle length The property Cycle len
Page 241 and 242:
It allows to define the number of b
Page 243 and 244:
Note It is not possible to have 0 a
Page 245 and 246:
Figure 6-47: Output data from the c
Page 247 and 248:
performed prior to phase sorting yo
Page 249 and 250:
Figure 6-51 Properties of the spect
Page 251 and 252:
Blocking Using the FFT-approach to
Page 253 and 254:
1,2 1,0 0,8 0,6 0,4 0,2 Weight fact
Page 255 and 256:
Output from the Spectrum object The
Page 257 and 258:
6.4.2 Advanced Spectrum object Load
Page 259 and 260:
To evaluate the new algorithm, comp
Page 261 and 262:
6.4.3 Correlation object Conclusion
Page 263 and 264:
20 16 12 8 4 0 0.0 0.2 0.4 0.6 0.8
Page 265 and 266:
Time The first column of the output
Page 267 and 268:
The Protocol Figure 6-67: Generic t
Page 269 and 270: How to Use the Initialisation Strin
Page 271 and 272: Figure 6-69: Traverse File option i
Page 273 and 274: Properties Output from MATLAB engin
Page 275 and 276: Result window Script Hides and disp
Page 277 and 278: 6.6.2 Calculation object from to
Page 279 and 280: Tip To combine calculated data and
Page 281 and 282: max var. max of all arguments sum v
Page 283 and 284: 6.7.3 Software set-up Once A/D-hard
Page 285 and 286: Figure 6-76 BSA F/P application win
Page 287 and 288: 6.7.7 Analog input specifications J
Page 289 and 290: 6.8.1 Installation 6.8.2 Hardware c
Page 291 and 292: Figure 6-85 BSA F/P application win
Page 293 and 294: 6.9.1 Required hardware 6.9.2 Calib
Page 295 and 296: 2. Select Parameter Input 3. The fo
Page 297 and 298: B. Select Advanced Curve fitting an
Page 299 and 300: 6.10 Mobile system Monitor option T
Page 301 and 302: 7. Reference guide 7.1 Theory of La
Page 303 and 304: Doppler effect d0 R(z) Figure 7-1 L
Page 305 and 306: es e2 e1 U Figure 7-3 Scattering of
Page 307 and 308: Measuring volume proportional to pa
Page 309 and 310: Laser fI Beam splitter As indicated
Page 311 and 312: 7.1.6 Frequency shift • Reduce th
Page 313 and 314: As long as the particle velocity do
Page 315 and 316: 7.1.7 Signals The primary result of
Page 317 and 318: 7.1.8 Seeding Seeding as flow field
Page 319: 150 90 180 0 180 0 180 0 210 120 24
Page 323 and 324: D is the particle diameter. βi is
Page 325 and 326: For reflection (Equation 7-16) The
Page 327 and 328: Figure 7-21: The effect of changing
Page 329 and 330: This is the principle of the spheri
Page 331 and 332: The trajectory effect The slit effe
Page 333 and 334: Figure 7-28:The DualPDA as a combin
Page 335 and 336: Figure 7-31: Reflection and refract
Page 337 and 338: Characteristic scattering angles At
Page 339 and 340: ⎛ ϕ ⎞ ϕ2 = 4arcsin⎜ ⎟ −
Page 341 and 342: Figure 7-36: The critical angle con
Page 343 and 344: Using side scatter (reflected light
Page 345 and 346: Mask Front Lens Eye-piece Spatial f
Page 347 and 348: Alignment of the eyepiece The focus
Page 349 and 350: This is often not necessary in 1D a
Page 351 and 352: For both orientations of polarizati
Page 353 and 354: Figure 7-46. The effect of changing
Page 355 and 356: Table of characteristic angles Defi
Page 357 and 358: n rel ϕ c1 ϕ b0 ϕ c2 ϕ b2 ϕ r2
Page 365 and 366: Choice of wavelength Choice of mask
Page 367 and 368: Choice of wavelength and focal leng
Page 369 and 370: Choice of polarization Choice of sc
Page 371 and 372:
Focal length Transmitter (FiberFlow
Page 373 and 374:
Polarization ring Fixing screw Push
Page 375 and 376:
Aperture plates The particle size r
Page 377 and 378:
Tighten the cable securely at each
Page 379 and 380:
Disconnect the receiving fiber V1 f
Page 381 and 382:
Step by step procedure Phase-Dopple
Page 383 and 384:
Lower half: The lower half of the b
Page 385 and 386:
Recommended acceptance angles of th
Page 387 and 388:
7.7.4 Air bubble in freon Character
Page 389 and 390:
7.7.6 Bubble of air in diesel oil C
Page 391 and 392:
7.7.8 Glass sphere in water Charact
Page 393 and 394:
7.7.10 Latex sphere in water Charac
Page 395 and 396:
Blocking increases calculation spee
Page 397 and 398:
In this particular example we get:
Page 399 and 400:
7.9 Moments (one-time statistics) 7
Page 401 and 402:
1 = N Mean D mean ui (7-31) N ∑
Page 403 and 404:
Software implementation Updating me
Page 405 and 406:
u v 2 2 = = ∑ ∑ tU tV 2 2 − 2
Page 407 and 408:
(histogram properties). ni is the n
Page 409 and 410:
volume is calculated for the class
Page 411 and 412:
D30 The volume mean diameter is cal
Page 413 and 414:
Three further factors are however i
Page 415 and 416:
d e ln 2 max 2 V do ∗ Vt = ( 7-48
Page 417 and 418:
Diameter bins The number of diamete
Page 419 and 420:
Trajectory dependent detection area
Page 421 and 422:
Corrected particle Max d e ( Di ) C
Page 423 and 424:
Integral time-scale τI Definition
Page 425 and 426:
The mean values of u(t) and v(t) ar
Page 427 and 428:
Low pass filtering & Step noise Obv
Page 429 and 430:
fc ≡ t 1 2 ∆ If the true signal
Page 431 and 432:
Estimator bias Estimator variance S
Page 433 and 434:
-again S’(f) is used to distingui
Page 435 and 436:
Zero padding Often the sampling per
Page 437:
As an example the Hanning window is
Page 440 and 441:
The Explorer window will now look s
Page 442 and 443:
8.2.2 Peer-to-Peer Configuration Co
Page 444 and 445:
. High Voltage or Figure 8-3: Calib
Page 446 and 447:
Invalid particles in the corners Th
Page 448 and 449:
Gaussain beam effect The following
Page 450 and 451:
To check for connection, right-clic
show all

BSA Flow Software Installation and User's Guide - CSI

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?