The aerofoil is suspended flexibly with eight springs in an external frame to permit torsional and transverse vibration of the aerofoil. The frame is simply attached with screws in the measuring section of the wind tunnel. Attachment points on the frame prevent excessive deflection of the aerofoil during the execution of the experiment. The springs can be attached at various positions on the aerofoil and frame in order to set different torsion rigidity levels.
HM 170.20 Aerofoil, spring-mounted
Features
- model for examination of self-starting vibration in aerodynamics
Learning objectives/experiments
- examination of fluttering vibrations on aerofoils
- the use of a stroboscope permits the observation of the natural forms of the vibrating aerofoil.
Scope of delivery
1 aerofoil with suspension and frame
1 manual
Accessories
required
HM 170 Open wind tunnel
Description
Technical details
Specification
- aerofoil for examination of self-starting vibration
- accessory for the wind tunnel HM 170
- aerofoil painted for smooth surface
Technical data
Aerofoil
- profile: NACA 0015
- shape: symmetrical
- LxWxH: 200x100x15mm
- weight: 0,157kg
- mass moment of inertia: 1,07*104kgm2
Spring rigidity
- single spring: 27N/m
- total rigidity, transverse: 216N/m
Torsional rigidity: 0,07…0,28Nm/rad
Dimensions and weight
LxWxH: 300x145x120mm
Weight: approx. 3kg
Media
Knowledge
Impressions
Accessories
HM 170.20