Accession Number:

ADA001337

Title:

Time-Dependent Thrust Generated by a Propeller Operating in a Turbulent Inflow.

Descriptive Note:

Technical memo.,

Corporate Author:

PENNSYLVANIA STATE UNIV STATE COLLEGE APPLIED RESEARCH LAB

Personal Author(s):

• Thompson,D. E.

Report Date:

1974-04-26

Pagination or Media Count:

24.0

Abstract:

The broadband radiated sound of a propulsor can be related to the time-dependent thrust generated by the propulsor due to operation in a randomly varying turbulent velocity field. In order to understand better the radiated sound phenomenon, an experimental and theoretical investigation of the time-dependent thrust response of a propeller due to operation in turbulent inflows having various characteristic parameters was conducted. The experimental investigations employ an unsteady thrust balance mounted in the drive shaft of a 5-bladed free-stream propeller. Measurements of the time-dependent thrust generated by the propeller were made for turbulent inflows having a range of characteristics length scales and a range of turbulent intensity.

Descriptors:

• *TURBULENT FLOW
• *THRUST
• *PROPELLERS
• TIME DEPENDENCE
• FLOW FIELDS
• RESPONSE
• FLUID FLOW

Subject Categories:

• Aerodynamics
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE