Space Grant Consortium - University of Wisconsin - Green Bay

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Introduction The analysis of wake vortex data is a very important factor in airport efficiency. These vortices are normally not dangerous at typical flying altitudes, but become increasingly perilous to other aircraft when encountered close to the ground. If an aircraft were to fly through the wake vortex of a leading aircraft at a low speed and low altitude, there would be a high chance for the aircraft to become unstable and crash. To a void s ituations s uch a s t his, r egulations ha ve been i mposed t hat force d elays i n b etween landings. Since the wake vortices are invisible to the naked eye, the only information about them has been collected through lidar detection. There has been no reliable system developed thus far to predict their motion, so the regulations are based on the weight of the plane that created the wake vortices (2005). However, this system can be very inefficient and creates useless delays because in most cases, wake vortices decay much quicker than when predicted using the weight of the plane. If a model were to be developed that predicted wake vortex decay more efficiently, landing schedules could be pushed much closer together, leading to less delays and higher number of uses of each runway every day. Currently t here a re t hree accep ted m odels f or an alyzing w ake v ortices. T hese w ere d eveloped using information gathered from lidar detection. The three analytical models are the Burnham- Hallock Model¹, the Lamb-Oseen Model², and the TASS Initial Vortex Model³. The equations and variables for these models can be found in Appendix A. The purpose of this research has been to take steps toward the goal of developing a program to compare the analytical models of wake vortices to actual collected data. If the two data sets can be s hown t o co rrelate, t hese analytical m odels can be us ed t o m ake l anding pr ocedures m uch more e fficient. The s pecific f ocus o f m y p art i n t his r esearch w as t o create a p rogram th at compared t he experimental d ata co llected o n d ifferent as pects o f circulation pr operties in the wake vortices as they decay. Summary of Research To b egin m y research o n w ake v ortices, I created a joined program that co mpared t he t hree analytical models mentioned earlier with Ryan Coder and Tim Feyereisen. My part of the project was to create the velocity profile for the Burnham-Hallock Model. The program allowed for the input of variables affecting the velocity and for the placement of the lidar simulator. When run, the pr ogram out put a c ontour pl ot of bot h vor tices a nd t he ve locity pr ofile a s t he l idar s wept through the wake vortices. This program gave a baseline understanding of the project we were working on as we split into our respective parts. The purpose of m y final program was t o cr eate a G raphical U ser Interface ( GUI) t o i mport circulation d ata an d allow t he u ser t o m anipulate t hat d ata i n o rder t o create p lots f or l ater 10
comparison. The GUI allows users to plot three different graphs at one time in order to directly compare ch aracteristics. The GUI also outputs the maximums and minimums of each data set. The incoming data can then be compared for both the positive and negative vortex include the age of the vortex, spatial coordinates, circulation strength, likeness, advection, and sink rate. The user is allowed to pick the dependent and independent variable for each data set and then has the option to save the view of the GUI under a title of their choosing. An image of the GUI before the data has been imported can be seen in Figure 1. Figure 1 : T he G UI Without D ata. This is a screenshot of the GUI before any data has been imported. As can be seen, the user is asked to first import a data set and is then able to choose between variables for plotting. The labels for the graph become visible only after the user has chosen the variables. After the data has been imported the user can plot up to three different data sets on the same plot. In the following example however, only two data sets have been used to compare the circulation strength decay of the positive and negative vortex. This is shown in Figure 2. 11
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Space Grant Consortium wisconsin UN
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THE CASSINI ENCOUNTER WITH THE GEM
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Th he proceedinngs of our 199th Ann
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Wisconsin Space Grant Consortium Un
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Part 3: NASA Reduced Gravity Progra
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EAA Women Soar - You Soar, Lee Siud
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Elijah High Altitude Balloon Projec
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Our experience with the HALO II lau
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which had been a problem in the pas
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Figure 6: 3-D GPS Generated Track o
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Results The seeds tested in the lab
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hour as we assumed the flight in th
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Experimental Results There are two
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A series of tests were done in a co
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380 360 340 320 23.3 Temp. (Celsius
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First Place, Non-Engineering: Schmi
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of the basis for fin designs came f
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ejection charge from the motor fire
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using rip-stop nylon cloth. To atta
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Page 50 and 51: Design Features The chief requireme
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Page 58 and 59: though a strong crosswind was prese
Page 60 and 61: Our Design Our rocket uses the basi
Page 62 and 63: e easily recovered. Bong recreation
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Page 67 and 68: Background and Context: Student Roc
Page 69 and 70: The Rocky Mountain Miners’ compet
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Page 74 and 75: The angle of repose of a granular m
Page 76 and 77: Experiment Design The experiment co
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Page 98 and 99: References ¹ Burnham, D.C., and Ha
Page 101 and 102: Validation of Novel Rigid Body Fric
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Page 107 and 108: Results Figure 5. Assembled hydraul
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Page 122 and 123: 7. Lemmon, E. W.; Huber, M. L.; McL
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B. Attenuation and Uncertainty Shoc
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Detector Array and ROIC SCA Mount L
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Detector Shock Environment The leve
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Orbiter (MRO), Moon Mineralogy Mapp
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4. NASA JPL. MIRI FOCAL PLANE SYSTE
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Is Lake Superior a significant sour
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each grid cell at daily resolution.
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Figure 3. (a) Seasonal cycle of lak
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Figure 5. Model pCO2 at the surface
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Marshall, J., A. Adcroft, C. Hill,
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numerical weather prediction (NWP)
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High Resolution Radiometer (AVHRR)
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On the morning of 26 May 2008, ther
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References Behnke, C., 2005: Synopt
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Figure 3 Figure 3 contains base ref
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A Comparative Study of Type IIb Sup
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Fig. 3.— Cartoon Image of SN blas
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Fig. 4.— Light curve of SN 2008bo
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type IIn Supernova SN 1995N,” 200
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and then can spiral in to the black
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Understanding the Evolution of Supe
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Radio  measurements  of  supe
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In the equations on the p
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SN 2008ax in NGC 4490 SN2008ax is a
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References Chevalier, R. A., “Int
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Computational Fluid Dynamical Model
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context of the k − ɛ model invol
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Figure 3: Experimental results (•
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direction results in the terminal s
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121 (2000). [Blue Ridge Numerics, I
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concentrated our effort specificall
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density, and Ps is a pressure tenso
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Properties of the GEM problem Recon
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Figure 1: Increase in reconnection
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Figure 3: Examples of agreement of
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Reflection and Refraction of Vortex
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Experimental Procedure The left han
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frames in the upper left corner, wh
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Vortex ring reflection. Similarly,
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References L Bernal and J Kwon. Vor
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group started in 1997 with the goal
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I conducted five semi-structured in
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In the example of the guinea pig pr
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explain t his t rend. F rom t alkin
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Research. Washington, DC: Pan Ameri
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Our team has two goals: 1. To put S
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fluctuating humidity, drying winds,
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western border of the Arkansas Rive
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adjusted to less than .4millisecond
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Cacti Experiment 18 has produced 10
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13. What N decomposer's are needed
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Abstract Toxic Offgassing Analysis
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The chambers were sealed and baked
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Tables 4 and 5 show offgassing comp
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there was no dichlorobenzene peak.
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eneficiation reagents. Ionic liquid
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Figure 3: Current versus voltage da
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Abstract New Initiatives in the Pro
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was noticed above the gel. A discol
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delicate structures (hairs). N o fu
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and A. Y. Rozanov, Eds., SPIE, Vol.
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Combining Writing Across the Curric
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But the study also reported a consi
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Educators’ Aerospace Workshop for
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2008-2009 Evaluation Educators’ A
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Some comments from participants 200
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The cost of a one credit graduate c
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EAA WOMEN SOAR - YOU SOAR Dr. Lee J
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� Incorporated the technology res
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Evaluation Results: At the conclusi
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Educational Standards: The National
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curriculum development, to provide
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and applications of GIS technology
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• A significant new outcome for t
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The design of this project and appl
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Activities at the workshop involved
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to give our students a series of PR
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In the past we have not focused on
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Providing High School Students with
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that th e current generations of s
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instruction a s pa rt o f t heir ow
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Wisconsin Space Grant Consortium &
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11:45-1:00 pm Lunch *** Concurrent
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Moderator: David B lock, A ssociate
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Second Place, E ngineering, Drew an
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Wisconsin Space Grant Consortium
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Space Grant Consortium - University of Wisconsin - Green Bay

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