Engineering Design Challenge: Thermal Protection System

Transcription

1 LIVE INTERACTIVE YOUR DESKTOP Engineering Design Challenge: Thermal Protection System Presented by: Kristy Hill September 28, 2011

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3 Thermal Protection System Have you had a chance to look at this lesson? Yes No

4 Syllabus Lesson overview NASA connection Lesson in detail Extensions

5 Introduction Design and build a thermal protection system on a rocket. Test the system using a propane torch.

6 National Standards Grade Level: 8 12 Transfer of heat energy Development of technology design Measurements, rounding, & graphing Calculating averages

7 Value to students National standards in science, math & critical thinking skills Student get excited about this challenge Opportunity to solve real world problems Use of creativity and scientific knowledge Learn about heat and heat transfer Develop presentation and communication skills

8 Do students know? Conduction Convection Radiation Conduction vs. Insulation

9 Do students know? 1. Insulation a. Energy that is transmitted in the form of rays, waves or particles b. The process by which heat or electricity is directly transmitted through a substance c. The movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink d. a material that reduces or prevents the transmission of heat or electricity

10 Do students know? 1. Insulation d 2. Radiation a. Energy that is transmitted in the form of rays, waves or particles b. The process by which heat or electricity is directly transmitted through a substance c. The movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink d. a material that reduces or prevents the transmission of heat or electricity

11 Do students know? 1. Insulation d 3. Conduction b 2. Radiation a 4. Convection c a. Energy that is transmitted in the form of rays, waves or particles b. The process by which heat or electricity is directly transmitted through a substance c. The movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink d. a material that reduces or prevents the transmission of heat or electricity

12 Do students know? Conduction Convection Radiation Conduction vs. Insulation

13 Thermal Conductivity the ability of a solid object to transmit heat within itself as well as into an object touching it Heat Capacity amount of heat energy an object can absorb without changing its overall temperature

14 Let s pause for questions from the audience

15 NASA Connection Thermal Protection Systems

16 Examples

17 NASA Connection

18 Ablative Thermal Protection Neither absorb nor radiate much heat. When the surface becomes very hot, the material starts to burn and erodes away.

19 Radiant Thermal Protection Designed for the Orbiter, so they must be reusable. Dissipate heat quickly. Four different kinds of thermal protective materials on the Orbiter.

20 Which has Radiant Thermal Protection? A B C

21 The Challenge Using the materials provided, build a thermal protection system that protects your rocket from severe heat for the longest possible time.

22 Lesson in Detail Thermal Protection Systems

23 The Lesson Students will take on the role of engineers for this lesson. They will attempt to solve a problem that NASA engineers are working on as they develop rockets.

24 Design Analyze Results Engineering Design Process Build Record Data Test

25 Prep Time 4 8 hours Read the guide Gather materials Construct the test stand Test your own design Set up the classroom

26 Baseline Protection Time Students will first test several unprotected assemblies to establish a baseline. Conduct at least three separate tests and calculate the average time for the baseline.

27 Student Design Sheet

28 Design Constraints Use only the materials specified to construct the thermal protection system (TPS). No glue in the TPS itself. TPS may not touch the dowel. TPS may not touch the glue.

29 Testing Designs Have a stop watch ready. Add mass as an extension activity. Caution: Anyone near the testing area should wear safety goggles. Caution: Allow design to cool before touching it with bare hands.

30 Student Discussion Allow students to share group results. What worked? What needs re designed? What would you do differently next time?

31 What works? The idea is to use air as an insulator in the system to protect the screw from getting hot. Watch this video for some ideas.

32 Extensions and Resources Thermal Protection Systems

33 Extensions Turn up the Heat Limit Designs by Mass Limit Designs by Size Design on a Budget Design with additional materials Real World: Hubble Thermal Blanket

34 Culminating Activity Create a storyboard poster that documents the evolution of the TPS designs from initial to intermediate to final stage.

35 Any other extension ideas? Type responses into the chat box.

36 NASA Explorer Schools Are you part of the NASA Explorer Schools program? Yes No

37 NASA Explorer School Website explorerschools.nasa.gov Sign in or sign up Video Tutorials

38 Finding the guide Teaching Materials Video Tutorials

39 Finding the guide Search

40 NASA Guide Thermal Protection System Live Seminars Video Collection

41 Video Collection

42 Let s pause for questions from the audience

43 Collaboration Making teaching Easy Search for: NASA Explorer Schools on facebook. Follow us on

44 COLLABORATION

45 Get your credit

46 Thanks for participating today.

47 Thank you to the sponsor of tonight's Web Seminar: This web seminar contains information about programs, products, and services offered by third parties, as well as links to third-party websites. The presence of a listing or such information does not constitute an endorsement by NSTA of a particular company or organization, or its programs, products, or services.

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49 National Science Teachers Association Dr. Francis Q. Eberle, Executive Director Zipporah Miller, Associate Executive Director Conferences and Programs Al Byers, Assistant Executive Director e-learning NSTA Web Seminars Paul Tingler, Director Jeff Layman, Technical Coordinator LIVE INTERACTIVE YOUR DESKTOP