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Öğe Biomechanical Workload Analysis of Aircraft Technicians(Platanus Publishing, 2024) KAFALI, Haşim; GÜÇLÜ, İbrahimWith the development of the aviation industry worldwide, the need for labor in this field has also increased. Increased workload has forced employees and employers to work more carefully. Employees must be physically and psychologically vigilant, and employers must provide the necessary safety and security for employees, as well as make the maintenance and repair environment workable and provide the necessary appropriate equipment. This will both increase the productivity of the employees and prevent unwanted injuries to the body of the working individual. In this review article, possible health problems that occur in the bodies of aircraft technicians due to their workload are discussed.Öğe Standards of Cabin Air Quality in Commercial Passenger Airplanes and Evaluations of Field Studies(Platanus Publishing, 2023) Kafalı, Haşim; Güçlü, İbrahimAirplanes generally contain a higher density of people, unlike indoor environments, and cannot be ventilated by natural means, as the outdoor conditions during flight are not favorable for life. At the altitude level of airplanes, the ambient temperature reaches below -45oC, and the outsideSince the drop in ambient pressure below approximately 5 psi [1] is below the levels that a human can withstand, the aircraft cabin is pressurized and air-conditioned by the system. During pressurization and air conditioning, arrangements are made within the limits that will ensure the suitability of human life. In these arrangements, a pressure difference within the limits that the cabin structure can withstand is taken into consideration when pressurizing. Because the pressure inside the cabin at high altitudes will be higher than the ambient pressure outside, a pressure force will occur, and the resistance of the aircraft structures to external pressure is less than the resistance to internal pressure. Other considerations are generally temperature, pressure, CO2, O3, humidity, and respirable volatile particles. In the system cycle applied by considering these criteria, it is aimed at ensuring a healthy and trouble-free flight by providing a suitable environment for passengers and flight crew.Öğe COMPUTATIONAL FLUID DYNAMICS ANALYSIS OF HELICOPTER DOWNWASH/SHIP AIRWAKE INTERACTION FLOWFIELD(Ege Üniversitesi Yayınevi, 2022) Alabaş, Hüsamettin Alperen; Nacaklı, YavuzThere are problems specific to the helicopter/ship dynamic interface that limit helicopter operations and cause difficulty associated with landing on a moving platform. Significant factors affecting such operations include visibility, ship motion and aerodynamic interactions of the helicopter with the turbulent airflow near the ship. Associated large velocity gradients and areas of turbulence are limiting operations of helicopter flight onto and from the decks of frigate type air capable ships. For this reason, overcoming the problems that the helicopter encounters as it lands and takes off requires the airflow around the ship and through the helicopter rotors to be well-understood. Ship dynamics, the ship induced airwake, and the aircraft/ship interaction strongly affect the processes such as helicopter takeoff from and landing on shipboards (Bridges et al., 2007). Helicopter shipboard operations impose flight envelope restrictions on the rotorcraft due to a harsher environment. This environment also includes ship airwake caused by ship motion, superstructure, and a respectively smaller landing area. A detailed knowledge of the airflow around the ship and the vicinity of the helicopter rotors are necessary to understand the problems associated with helicopter takeoff and landing. The airwake of the ship includes the region of separated flow on the lee side of the ship’s superstructure and hangar door. This region contains steep spatial gradients in flow speed and direction and also contains significant unsteadiness over the bandwidth of concern with respect to handling qualities 0.2-2 Hz (Lee et al., 2013). These characteristics typically have a negative impact on helicopter handling qualities. The time-averaged and unsteady flow phenomena can influence the rotor generated loads and lead to increased pilot workload (Zan et al., 1994).
