Question 1

What is the primary focus of the review presented in this document?

Accepted Answer

Mid to low lift-to-drag ratio vehicle geometries for EDL

Question 2

Which of the following is NOT listed as a critical area within the aerothermodynamic environment for EDL missions?

Accepted Answer

Structural Integrity

Question 3

According to the text, which method is often prohibitively expensive for defining EDL aerothermodynamic environments?

Accepted Answer

Flight-testing

Question 4

What is a primary role of wind tunnel testing in recent years, in addition to its customary role?

Accepted Answer

Providing high-fidelity data for computational model development and validation

Question 5

Which NASA LaRC facility is currently mothballed and non-operational?

Accepted Answer

20-Inch Mach 6 CF4 tunnel

Question 6

The 31-Inch Mach 10 Air Tunnel is primarily employed in which types of studies?

Accepted Answer

Aerodynamic and fluid-mechanics studies

Question 7

Which LaRC wind tunnel is primarily used for heat-transfer and boundary-layer transition studies due to its wide Reynolds number operating range?

Accepted Answer

20-Inch Mach 6 Air Tunnel

Question 8

The 15-Inch Mach 6 High-Temperature Air Tunnel is considered a leg of which larger facility?

Accepted Answer

31-Inch Mach 10 Air Tunnel

Question 9

What is a key characteristic of the 20-Inch Mach 6 CF4 tunnel that allows it to simulate high-temperature, reacting air at lower Mach numbers?

Accepted Answer

Higher shock density ratio

Question 10

The NASA Langley Unitary Plan Wind Tunnel (UPWT) is a closed-circuit, continuous-flow pressure tunnel with how many separate legs?

Accepted Answer

Two

Question 11

Which measurement technique provides global heat-transfer information with an order-of-magnitude more data points than discrete-gage techniques at a fraction of the cost?

Accepted Answer

Phosphor thermography

Question 12

What does Pressure-Sensitive Paint (PSP) measure?

Accepted Answer

Surface pressure

Question 13

Which technique is employed to obtain surface flow-field patterns by observing the movement of oil on a model's surface?

Accepted Answer

Oil flow visualization

Question 14

What type of measurement technique is generally more expensive and provides less spatial resolution but is often necessary for temporal data?

Accepted Answer

Discrete surface measurement techniques

Question 15

Which of the following is NOT a discrete surface temperature and heat-transfer measurement technique mentioned?

Accepted Answer

Infrared thermography

Question 16

What type of balances are typically used for aerodynamic force and moment measurements?

Accepted Answer

Strain-gage balances

Question 17

Which technique is available for visualization of flow-field shock structures in all tunnels?

Accepted Answer

Schlieren systems

Question 18

What is the primary role of the LAURA code at NASA Langley?

Accepted Answer

Hypersonic conditions simulations

Question 19

Which computational solver uses unstructured grids to deal with complex topologies?

Accepted Answer

FUN3D

Question 20

What was a critical design consideration for the Mars Science Laboratory (MSL) entry vehicle due to its size, angle of attack, and entry velocity?

Accepted Answer

The possibility of turbulent flow on the leeside

NASA Langley's Aerothermodynamic Capabilities for Entry, Descent, and Landing

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