Air Vehicle Technology Integration Program (AVTIP). Delivery Order 0020: Prediction of Manufacturing Tolerances for Laminar Flow, Task 6

Abstract

The ultimate goal of the MEATLOAF study is to develop generalized criteria for the allowable size of an excrescence on a laminar flow wing to prevent premature transition. A salient feature of the study is the nondimensionalization of the critical parameters such that the results are applicable to future work and not specific to a particular airframe. Task 1 provided a database of step effects at Reynolds numbers up to approximately 7.5x105. Task 6 is the first step towards extending the Reynolds numbers range to chord Reynolds numbers more applicable to aircraft such as Global Hawk for small pressure gradients. The feasibility of additional testing to include the full-range of pressure gradients at these higher Reynolds numbers was assessed. Figures 1-3 show the approximate range of chord Reynolds numbers for the initial testing of Task 6 in comparison to the completed Task 1 testing.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2006
Accession Number
ADA472336

Entities

People

  • Aaron Drake
  • Anne M. Bender

Organizations

  • Northrop Grumman

Tags

Communities of Interest

  • Air Platforms
  • Sensors
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Aircrafts
  • Airframes
  • Boundary Layer
  • Databases
  • Flow
  • Laminar Flow
  • Measurement
  • Pressure Distribution
  • Pressure Gradients
  • Skin Friction
  • Static Pressure
  • Test Facilities
  • Two Dimensional
  • Vehicles
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Instructional Design and Training Evaluation.
  • Software Engineering