Thermal and mechanical characteristics of loudspeakers using a magnetic gap filled with a magnetorheological suspension

Journal Article · Fri Jul 01 00:00:00 EDT 1988 · Magnetohydrodynamics (Engl. Transl.); (United States)

OSTI ID:6165410

Shul'man, Z P; Kordonskii, V I; Khusid, B M; Voronovich, G K; Demchuk, S A; Kuz'min, V A

This paper presents some theoretical and experimental results of a study of the heat-transfer characteristics of the voice coil of an electrodynamic loudspeaker and the mechanics of its movable system for a gap filled with a magnetorheological suspension. The heat transfer and motion of the voice coil of a type 4GD-35 electrodynamic loudspeaker were investigated experimentally at the resonance frequency. The coil was heated by a high-frequency signal which was delivered together with the low-frequency signal driving the coil. The motion of the coil under unsteady nonisothermal conditions was modeled under the assumption that the suspension undergoes Couette flow in the gap of the coil.

• OSTI ID: 6165410
• Journal Information: Magnetohydrodynamics (Engl. Transl.); (United States), Vol. 24:1; Other Information: Translated from Magnit. Girodinam.; 24: No. 1, 79-84(Jan-Mar 1988)
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
MAGNET COILS
HEAT TRANSFER
MAGNETIC LIQUIDS
MATHEMATICAL MODELS
SUSPENSIONS
MAGNETOHYDRODYNAMICS
ELECTRIC CURRENTS
ELECTRODYNAMICS
ELECTROMAGNETS
ENERGY EFFICIENCY
EQUATIONS OF MOTION
FLOW RATE
FREQUENCY DEPENDENCE
HEATING
MAGNETIC FIELDS
OSCILLATIONS
RHEOLOGY
SHEAR
STRESS RELAXATION
CURRENTS
DIFFERENTIAL EQUATIONS
DISPERSIONS
EFFICIENCY
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ENERGY TRANSFER
EQUATIONS
EQUIPMENT
FLUID MECHANICS
FLUIDS
HYDRODYNAMICS
LIQUIDS
MAGNETIC MATERIALS
MAGNETS
MATERIALS
MECHANICS
PARTIAL DIFFERENTIAL EQUATIONS
RELAXATION
320303* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Equipment & Processes