CONE DRAG IN A RAREFIED GAS FLOW

Abstract

The tests were conducted to obtain empirical cone-drag information about the intermediate slip-flow regime. The mean free path of the gas adjacent to the cone surface ranged from 10 to 15% of the calculated displacement- thickness of the boundary layer at the base of the cone. The total drag on the fore portion of a 15 deg half-angle cone (3.70-in. slant length) was investigated. A compact remote balance was developed which gave sufficient accuracy for the measurement of the small forces involved. Drag coefficient curves were obtained which are probably accurate to within 2 to 3% or better at M = 4.0 and possibly 5% at M = 2. The experimental results for viscous drag were 10 to 30% above the predictions based on first-order boundary-layer analysis of shear and pressure distribution. A description of the experimental apparatus and details of the calibration and testing techniques are appended.

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Document Details

Document Type
Technical Report
Publication Date
Aug 10, 1953
Accession Number
AD0020149

Entities

People

  • D. C. Ipsen

Organizations

  • University of California, Berkeley

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Coefficients
  • Dynamic Pressure
  • Equations
  • Flow Fields
  • Fluid Dynamics
  • Fluid Flow
  • Free Stream
  • Gas Flow
  • Geometry
  • Heat Transfer
  • Knudsen Number
  • Mathematical Analysis
  • Measurement
  • Pressure Distribution
  • Pressure Measurement
  • Slip Flow

Readers

  • Aerospace Test and Evaluation
  • Fluid Mechanics and Fluid Dynamics.