Identification of roll damping coefficient using the free rotation method-Reference-Cited by-同舟云学术

Identification of roll damping coefficient using the free rotation method

Published:2024-03-11 Issue:1 Volume:16 Page:15-24
ISSN:2247-4528
Container-title:INCAS BULLETIN
language:en
Short-container-title:INCAS BULLETIN

Author:

BUNESCU Ionut¹,PRICOP Mihai-Victor²,STOICAN Mihaita-Gilbert²,HOTHAZIE Mihai-Vladut³

Affiliation:

1. INCAS – National Institute for Aerospace Research “Elie Carafoli”, B-dul Iuliu Maniu 220, Bucharest 061136, Romania, bunescu.ionut@incas.ro and Doctoral School of Aerospace Engineering, POLITEHNICA Bucharest National University for Science and Technology, Splaiul Independentei 313, 060042, Bucharest, Romania

2. INCAS – National Institute for Aerospace Research “Elie Carafoli”, B-dul Iuliu Maniu 220, Bucharest 061136, Romania

3. INCAS – National Institute for Aerospace Research “Elie Carafoli”, B-dul Iuliu Maniu 220, Bucharest 061136, Romania and Doctoral School of Aerospace Engineering, POLITEHNICA Bucharest National University for Science and Technology, Splaiul Independentei 313, 060042, Bucharest, Romania

Abstract

The free rotation method represents the simplest method for roll damping coefficient identification in experimental aerodynamics. To apply this method, it is necessary to spin the model to a desired angular velocity and then release the model to spin freely under flow conditions, recording the variation in time of the model’s rolling rate. Thus, applying the logarithmic decrement formula at any roll rate between near zero and the desired angular velocity, the roll damping moment will be calculated. This paper presents the application of the free rotation method on raw data obtained for different Mach numbers and incidences, considering different regression functions, time windows and their implications. Last but not least, the necessary correction methods and their impact on the results are presented.

Publisher

INCAS - National Institute for Aerospace Research Elie Carafoli

Reference8 articles.

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