Hypersonics

Hypersonics is an activity developed by Learning Undefeated to help students explore thermodynamics and the importance of heat transfer as it relates to speeds over Mach 5.

Hypersonic is in reference to the speed of an object going past Mach 5. Research in this field has been ongoing since the 1960s with space shuttle programs that reach over Mach 25 during re-entry from space. Current ventures in space shuttle technology have shifted over to designing even more advanced materials in hopes of sustainability/reusability in space travel. Furthermore, the application of hypersonics to more regular commercial use, such as air travel, would reduce flight time significantly. What normally takes 5 hours to fly across the United States would only take 30 minutes!

The Department of Defense is researching hypersonics primarily for the purpose of strategic defense. Currently, hypersonic technology is readily available for military use but is very expensive and cost-prohibitive. Efforts are being made to identify and develop cost-effective counter-measures as means of layering defense strategies against foreign opposition. Innovation in this field can be found primarily through the development of materials as seen with space shuttles (carbon-reinforced materials) or sustainability of production of materials (3D printing).

In this activity, students will learn what hypersonics is as it relates to space shuttles and the role of thermodynamics and heat transfer in finding successful space flight.

Learning Objectives

Standards Alignments + Connections

Next Generation Science Standards Connections

HS-PS3-4: Plan and conduct an investigation to provide evidence that the transfer of thermal energy when two components of different temperature are combined within a closed system results in a more uniform energy distribution among the components in the system (second law of thermodynamics)

Texas Essential Knowledge and Skills for Science Connections

CHEM.11.A: Describe energy and its forms, including kinetic, potential, chemical, and thermal energies.

CHEM.11.B: Describe the law of conservation of energy and the processes of heat transfer in terms of calorimetry.

CHEM11.D: Perform calculations involving heat, mass, temperature change, and specific heat.

Virginia Science Standards of Learning Connections

CH.7A: heat energy affects matter and interactions of matter

Activities to Gather Evidence

Pre-Laboratory Engagement

Equipment Safety Game: Musical Test Tubes

This is a quick game designed to introduce students to using a test tube and test tube clamp, and how to carefully place test tubes into the beakers they will be using during the experiment.

Time: 15-20 minutes

Materials:

Plastic Test Tubes (1 per student)
Test tube clamp (1 per student)
Heat safe gloves
Plastic cups (Dixie or other 9oz cups, 1 per student)

Setup:

Place enough cups for each student to have one randomly around classroom
Have each student standing, holding test tube in clamp in gloved hand (no heat will be used during this game, but students should prepare themselves for the PPE they will be using during the lab)

Rules:

While music is playing, students are to move about the room continuously
When music stops, students must carefully place their test tube into the cup nearest them
- If the cup is knocked over by over-zealous student, that student is out and has a seat
Once music begins again, students must pick up their test tubes using the clamp, again, if the dixie cup is knocked over the student is out and they have a seat
Play a few rounds without removing any cups, so that students can practice using the clamp with little pressure.
Once students have the hang of the game and using the test tube clamps, introduce a bit of pressure by removing one cup at a time from the classroom
- Rules remain the same, if cups are knocked over student is out
- If two students are involved in a cup being knocked over, both are out.
Continue until last student standing

Difference between Thermal Energy, Heat, and Temperature:

Have students watch video linked HERE (https://www.youtube.com/watch?v=K0SiEq3GAj0) and then use this simulation to observe the relation between energy and temperature:

https://teachchemistry.org/classroom-resources/simulation-activity-heating-curve-of-water

Ask students to select points on the graph and make observations about the total energy required for the system:

Why is energy still required to maintain a constant temperature along the graph?
Is more or less energy needed to increase the temperature?

Activity

Download Student Handout (Above)

Hypersonic may sound like cutting-edge research, and something you heard from Top Gun: Maverick, but it has been around since the 1950s. With all the news about space travel, humans have been tackling, and succeeding, the challenge of surviving hypersonic speeds.

Hypersonic refers to any speed above Mach 5, which is five times greater than the speed of sound. It is at this speed that hypersonic flow occurs, and surviving the shockwave and immense heat becomes the challenge. However, humans have faced this challenge head-on throughout history, surviving speeds as high as Mach 35 during re-entry to Earth’s atmosphere. It is at these speeds that our hypersonic vehicles are heating up to 3,000° C. Through innovation and our understanding of science, humans have been able to successfully put people into space and back to Earth safely.

Recently, there has been an increase in interest from the Department of Defense in hypersonic technology as a means of strategic defense. Having a better understanding of innovation in hypersonics allows for a stronger defense, but can have major commercial implications as well. Flights across the United States that take 5 hours, can be as short as 30 minutes! The issue is whether airplanes are able to survive at these speeds. Sustainability and reusability continue to be at the forefront of hypersonic innovation, and thermodynamics and heat transfer are the foundations in the field.

Our activity uses Energy2D to model thermodynamics and heat transfer. This is free to download from the Concord Consortium

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