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Master's Dissertation
DOI
10.11606/D.3.2009.tde-01062009-165630
Document
Author
Full name
Danilo de Moura
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2009
Supervisor
Committee
Tribess, Arlindo (President)
Krieger Filho, Guenther Carlos
Zaparoli, Edson Luiz
Title in Portuguese
Condições do escoamento e de conforto térmico em cabine de aeronave.
Keywords in Portuguese
Aeronave
Cabine
Conforto térmico
Escoamento
Abstract in Portuguese
A aviação comercial vem experimentando expressivo crescimento com elevado grau de competitividade. Produzir aeronaves com nível de conforto diferenciado transformou-se em importante ferramenta de marketing e de venda. Esta, porém, não é tarefa fácil. Cabines de aeronave apresentam condições de escoamento e de trocas térmicas que tornam bastante difícil prover e avaliar condições de conforto térmico. Para tentar resolver o problema, estudos estão sendo realizados em centros de pesquisa, em colaboração com a indústria aeronáutica. O presente trabalho se insere neste contexto. Neste trabalho foi realizado estudo do escoamento em cabine de aeronave, por meio de medição de variáveis ambientais de cabine, e de conforto térmico utilizando manequim térmico instrumentado e avaliação com pessoas. Para a realização dos ensaios foi projetado e construído mock-up de seção de cabine com 12 lugares. Foram analisadas condições do escoamento e de conforto térmico para duas condições de cabine, 19 e 24 °C. Nos ensaios com pessoas participaram 11 voluntários. Temperaturas equivalentes foram determinadas utilizando-se manequim térmico instrumentado e apresentadas em diagrama de sensação térmica previsto para este fim em norma técnica de veículos. Posteriormente, avaliações subjetivas, com resultados apresentados em diagramas de voto térmico médio (VTM) e de voto de conforto médio (VCM), foram realizadas. Verificou-se que, apesar das condições complexas do escoamento, não ocorreram diferenças significativas de velocidade do ar na região de ocupação e nem de temperatura na direção vertical, que são fatores que poderiam ocasionar grande desconforto. Verificou-se também a ocorrência de uma boa aproximação entre as avaliações de conforto térmico feitas por meio das temperaturas equivalentes e os resultados das análises subjetivas realizadas por meio de questionários. Nas avaliações subjetivas ocorreu um pequeno deslocamento dos resultados para o lado direito no diagrama de VTM. Finalmente, verificou-se que as pessoas preferiram as condições de cabine na temperatura de 19 °C, com votos de conforto médio (VCM) de indiferentes a ligeiramente confortáveis, enquanto na temperatura de cabine de 24 °C as condições foram consideradas ligeiramente desconfortáveis.
Title in English
Air flow conditions and thermal comfort in aircraft.
Keywords in English
Aircraft
Airflow
Cabin
Thermal comfort
Abstract in English
The commercial aviation has experienced an expressive growth with a high degree of competitiveness. The production of aircrafts with a higher comfort level has become an important tool for marketing and trading. However, this is not an easy task. Aircraft cabins present airflow and thermal transfer conditions that make quite difficult to provide and to evaluate thermal comfort conditions. In order to try to solve this problem, studies are being performed in research centers, in collaboration with the aeronautical industry. This project is inserted in this context. In this project a study of aircraft cabin airflow, through the measurement of the cabin environmental variables, and the thermal comfort using thermal mannequin and evaluation with people, was accomplished. For the accomplishment of the tests a mock-up of a cabin section with 12 places was projected and built. Conditions of airflow and thermal comfort within two cabin conditions, 19 and 24 °C, were analyzed. The tests with people were performed by 11 volunteers. Equivalent temperatures were obtained by using a thermal mannequin and were presented in a thermal sensation diagram, which had been seen to this purpose in vehicles technical norm. Later on, subjective evaluations, whose results were presented by an mean thermal vote (MTV) diagram and by an mean comfort vote (MCV) diagram, were accomplished. It was verified that, in spite of the complex airflow conditions, significant differences neither of the air velocity in the occupation area nor of the temperature in the vertical direction happened, which are factors that could cause a great discomfort. It was also verified a strong relation between thermal comfort evaluations accomplished through the equivalent temperatures and the results of the subjective analyses accomplished through questionnaires. In the subjective evaluations, a small displacement of the results to the right side in the MTV diagram occurred. Finally, it was verified that the volunteers preferred 19 °C temperature cabin condition, with mean comfort votes (MCV) indicating from indifferent to lightly comfortable conditions, while in the 24 °C cabin the conditions were considered lightly uncomfortable.
 
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Publishing Date
2009-07-20
 
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