Numerical And Experimental Investigation On A
Maritime Radar Scanner
Author(s)
S. Muggiasca, F. Ripamonti, D. Rocchi & A. Zasso
Abstract
This paper presents the study of the aerodynamic behaviour of a standard radar
scanner used for maritime applications. The radar scanner is a bluff body more
than 2 m long that, during its operating conditions, rotates under relative wind.
The requirements for good radar performances are an almost constant angular
velocity under different wind conditions, and the capability to start from rest
under strong wind, with a consequent large dimensioning torque and power of
the motor. An experimental campaign and a numerical study have been carried
out in order to better understand the flow-structure interaction. Experimental
tests were performed at Politecnico di Milano wind tunnel on the radar scanner
in full scale both in static and in dynamic conditions. During static tests the
aerodynamic forces on the radar scanner have been measured changing the wind
angle of attack. The dynamic tests have been carried out using the electric motor
and the gearbox normally used to move the radar. Critical operating conditions
have been reproduced driving the radar to rotate under strong wind velocity and
measuring the motor torque and the radar angular velocity. Both the tests pointed
out a very high aerodynamic moment opposing the radar rotation, thereby
reducing its velocity to point of stopping it. In order to better understand how the
radar interacts with the flow, 3D CFD analysis has been carried out comparing
the results against the experimental data.
Keywords: radar aerodynamic coefficients, wind tunnel tests, CFD analysis.
1 Introduction
The dynamic behaviour of radar antennas is strongly affected by the fluidstructure
interaction between the relative wind and the bluff body dynamics of
Keywords
radar aerodynamic coefficients, wind tunnel tests, CFD analysis.
Related Book
Other papers in this volume
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