Presentation on theme: "PRESENTATIONS ME4331 Terry Simon THERMAL SCIENCE LABORATORY April 13, 2006."— Presentation transcript:
PRESENTATIONS ME4331 Terry Simon THERMAL SCIENCE LABORATORY April 13, 2006
2 OUTLINE INTRODUCTION PURPOSE OF YOUR PRESENTATION OBJECTIVES OF THE WORK TO BE PRESENTED MAIN OBSERVATIONS – A SUMMARY DELIVERING YOUR MESSAGE OBJECTIVES PROCEDURE AND FACILITY RESULTS CONCLUSIONS SUMMARY AND RECOMMENDATIONS
3 INTRODUCTION PURPOSE OF YOUR PRESENTATION Remember, you are only introducing at this point. This will be short, but important. Consider your audience. What are their interests? Target your presentation to them. OBJECTIVES OF THE WORK TO BE PRESENTED Remember, in the body you will discuss how you met the objectives, or you will comment on how continuation work might meet them. Relate the objectives to the audience. What will they want to learn? MAIN OBSERVATIONS – A SUMMARY The essence of what you learned. A teaser to get them interested and attentive to listen for the details.
4 DELIVERING YOUR MESSAGE OBJECTIVES PROCEDURE AND FACILITY Identify cases studied; parameters varied. Show a picture or schematic (whichever is more clear to understand at a glance). Discuss measurement methods and instrumentation. Show a picture or a schematic (whichever is more clear) if needed. RESULTS Give the most important results, don’t dilute with minor results. Give enough description that all understand how you arrived at these results. CONCLUSIONS What are these results telling? What conclusions can be drawn from them.?
5 SUMMARY AND RECOMMENDATIONS Repeat the highlights of the presentation. Tell them what you just told them. Your objectives. How you approached the question. What was done What was concluded. Here is where your main results (only a few main ones) are clearly presented. There will undoubtedly be unfinished business or reflections on how the work may be extended. Address it here. This should not be a dominant part of this section – a presentation of the most important results is the most important part.
6 OTHER POINTS TO KEEP IN MIND Reference the work and contributions of others. Reduce the number of main points per slide to a few, no more than five or six. You may want to step through them. Stay within your allotted time. The audience will accept a presentation that is a bit too short, but is not very tolerant of one that is too long. Say, “This is important to me and I want it to be important to you!” by: Looking at the audience. Speaking to the audience; slowly, distinctly, with appropriate volume and with enthusiasm. Dressing appropriately. Avoiding slang and “casual” language.
7 MORE POINTS TO KEEP IN MIND Move a bit. Don’t be a statue, but don’t be too busy either. Use hand gestures, but not excessively. Keep your hands out of your pockets and don’t fiddle with whatever you may be holding. Use crib sheets if you must. Though, with practice, you should not need them except for some details you wish to be sure to get right. Decide ahead of time how you will note various points on the visuals: rigid pointer, light pointer, mouse pointer, etc. Figure out ahead of time what questions may be asked, and prepare responses.
8 AND, MOST IMPORTANTLY: PRACTICE PRACTICE, PRACTICE
10 DOE NASA Unsteady temperature measurements within the regenerator Computation and visualization of unsteady flows within the engine expansion space, Bulk flow Temperature Stirling Engine Aerothermal Experiments Time Radial Location
11 High Temperature and Plasma Laboratory Selected Current Projects Arc plasma instabilities and plasma generator control plasma jet shear layer instability diagnostics and control - experimental investigation of fluid dynamic interaction between plasma jet, cold gas arc-anode attachment instability - effect of cold gas boundary layer - 3-D time dependent model of plasma fluid dynamics plasma cutting torch optimization - cathode erosion studies - nozzle design effectiveness through spectroscopy
12 Lens System High Speed Video Camera Nozzle with Sapphire Window Cutting Torch Cathode Erosion High Speed Observation, 200 A arc in O 2, Hf cathode
13 Anode Boundary Layer Modeling Temperature and velocity distributions and Comparison with photo
14 Atmospheric Aerosol Research Instrumentation Development –novel measurements –commercialization Laboratory Research Atmospheric Research –multidisciplinary field studies –radiative transfer –nucleation –gas-to-particle formation
15 Real world and laboratory emission measurements Sensors Renewable fuels Fundamental studies Engine and particle research in Center for Diesel Research Microengine
16 Advanced Space Power Source Stirling Convertor Regenerator Microfabrication Technical Challenges Identify right concept & fab technique Fabricate the regenerator with microfab techniques Address life & reliability, in addition to performance Concepts Lenticular Honeycomb Involute Foil NASA Space Power Initiative Goals Microfabricate new Stirling convertor regenerator Precisely defined geometrical features that can be refined to enhance radial heat transfer & reduce axial heat transfer & DP Improve the performance of the Stirling engine
Shear Flow Control Laboratory Shear Flow Control Laboratory Dynamics & Control of Low-Density Jets Low density jets are inherently unstable, leading to considerable mixing between the primary jet fluid and surrounding ambient fluid. Control strategies are being developed to exploit the stability characteristics of these flows. Dynamics & Control of Low-Density Jets Low density jets are inherently unstable, leading to considerable mixing between the primary jet fluid and surrounding ambient fluid. Control strategies are being developed to exploit the stability characteristics of these flows. Schlieren Image PIV Image Combustion using JP-10 Jet Fuel Research is being carried out to better understand the turbulent flame characteristics in a backward-facing dump combustor proposed for use in a scramjet engine. Lean premixed-prevaporized JP-10 jet fuel is introduced upstream of the step and burned downstream of the step producing a bright blue flame. In the absence of control the flame is highly unstable, producing strong oscillations. Counterflow is applied at the trailing edge of the step to disrupt the periodic motion, leading to a stable flame located in the lower portion of the combustion chamber. Combustion using JP-10 Jet Fuel Research is being carried out to better understand the turbulent flame characteristics in a backward-facing dump combustor proposed for use in a scramjet engine. Lean premixed-prevaporized JP-10 jet fuel is introduced upstream of the step and burned downstream of the step producing a bright blue flame. In the absence of control the flame is highly unstable, producing strong oscillations. Counterflow is applied at the trailing edge of the step to disrupt the periodic motion, leading to a stable flame located in the lower portion of the combustion chamber. U1U1 U1U1 H H U2U2 U2U2 Schematic Stable combustion using counterflow – heat release ~ 100 kW
Develop heat exchangers for charge-air coolers and radiators Develop collectors & heat exchangers for solar water heating Polymer Heat Exchangers Polymer Heat Exchangers NSF, DOE-NREL Goals Theoretical and experimental studies of unique tubular geometries for enhanced heat transfer Shaped Tubes Woven Tubes
19 Micro-channels : Flow boiling & forced convection Micro-channels : Flow boiling & forced convection Flow Steady state void pattern resulting from boiling. Average void ~0.20. A color CCD camera is used to obtain a qualitative measure of outlet void fraction. Transient temperature response of a micro-channel plate