Thermal comfort analysis of military aircraft cabin using computational fluid dynamics

Download

index.pdf

Date

2022-9

Author

Köse, İrem

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

495
views

397
downloads

Thermal comfort is essential for human health and welfare during aircraft operations. In military aircraft, these thermal problems are getting more difficult because of the high-altitude operations, cockpit transparency, mission flights, pilot clothing, and an increasing amount of mission equipment. Therefore, supplying the correct amount of cooling air into the cockpit, good air distribution around the occupants, and keeping the other thermal comfort measurements at a satisfactory level in the cockpit significantly impacts pilots’ thermal comfort. In this study, the thermal comfort of pilots in the cockpit is aimed to be developed with the help of thermal comfort measures and CFD modeling. During the evaluation, general thermal comfort parameters have been defined and assessed with the standards (JSSG-2009, SAE-ARP-85F, and MIL-E-18927E). Then, a suitable CFD turbulence model was chosen for the analyses, and it was validated with the numerical and experimental results given in the literature. With the performance model generation, the cockpit air distribution model was evaluated with the help of thermal comfort measures. According to the results, old-type piccolo air inlet models have been found insufficient to provide comfortable conditions to the occupant. Therefore, a more newly used version of the air inlet, which provides jet flow to the cabin, and foot inlet have been evaluated, and it was found more efficient than the piccolo-type air inlets. In addition, foot inlets influenced the air distribution around the cockpit positively. As a result of this study, evaluating the comfort with general parameters is not enough to compare the thermal conditions. However, the positive effect of changing the inlet type from piccolo to gasper and adding foot inlets has been observed.

Subject Keywords

CFD Modelling, Thermal Comfort, Piccolo inlet, Gasper inlet, WBGT

URI

https://hdl.handle.net/11511/99496

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Real-Time Monitoring of Cognitive Workload of Airline Pilots in a Flight Simulator with fNIR Optical Brain Imaging Technology Çakır, Murat Perit; Koc, Suleyman Ozgur; Toktas, Ahmet (2016-07-22) Real-time monitoring of the flight crew's health status with ambient and body sensors have become an important concern to improve the safety and the efficiency of flight operations. In this paper we report our preliminary findings on a functional near-infrared spectroscopy (fNIR) based online algorithm developed for real-time monitoring of mental workload of an airline pilot. We developed a linear discriminant analysis (LDA) based classifier that aims to predict low, moderate and high mental workload states...
Propulsion system selection and modeling for a quadrotor with search and rescue mission Kaya, Derya; Kutay, Ali Türker; Kurtuluş, Dilek Funda; Tekinalp, Ozan; Şimşek, İlay; Soysal, Sefa; Hosgit, Gürkan (null; 2016-01-08) This study presents the development activities of a Quadrotor for search and rescue operations. There are four main specifications: The total weight of the vehicle is should be less than 4 kg, the endurance of the quadrotor should be at least 45 minutes in hovering flight, the vehicle shall carry a high resolution video camera to be transmitted live to the ground station, commertial of the shelf parts shall be used as much as possible. The initial design required the selection of the propulsion system. Five...
Havacılık Nöroergonomisinde Optik Beyin Görüntüleme Uygulamaları Çakır, Murat Perit (2021-06-01) Pilotların, insansız hava aracı operatörlerinin, hava trafik kontrolörlerinin eğitim ve uçuş faaliyetleri sırasında bilişsel durumlarının takibini sağlayacak nesnel yöntemlerin geliştirilmesi uçuş emniyetinin sağlanması, eğitim süreçlerinin optimizasyonu ve yenilikçi insan-makine arayüzlerinin tasarımı bakımından kritik önem taşımaktadır. İşlevsel Yakın-Kızılötesi Tayfölçümü (functional near infrared spectroscopy – fNIRS) optik beyin görüntüleme teknolojisi gibi saha kullanımına uygun, portatif ve güvenilir...
Integrated procurement and transportation planning for purchased components: a case study Yanık, Hatice Deniz; Bayındır, Zeynep Pelin; Department of Industrial Engineering (2008) This study is about an integrated procurement and transportation planning system for purchased components of a consumer-durables manufacturer. Due to transportation cost structures and demand characteristics our problem can be classified as a variant of the dynamic-demand joint replenishment problem. The problem is to determine the replenishment policy using the advantages of coordinated transportation of items that will minimize the sum of total inventory holding and tranportation costs over a finite plann...
Steady-State CFD Analysis of 3D Bio-inspired Flapping Wing Models Bektaş, Mürvet; Kurtuluş, Dilek Funda; Güler, Mehmet Ali (2018-07-11) The aerodynamics of insects flying at low Reynolds numbers is considered for Micro Air Vehicles (MAV) designs. The aim of this study is to analyze different flapping wing models and to predict generated forces and vortices around the wings. The analyses are significant for understanding properties of flying animals like birds, insects and for improving MAVs more. For three insect species (namely, bumblebee, hawkmoth, and hummingbird), three dimensional (3D) wing models are numerically analyzed at different ...

Citation Formats

İ. Köse, “Thermal comfort analysis of military aircraft cabin using computational fluid dynamics,” M.S. - Master of Science, Middle East Technical University, 2022.