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3-Port Turbo Mixer Systems

IP.com Disclosure Number: IPCOM000239141D
Publication Date: 2014-Oct-16
Document File: 5 page(s) / 262K

Publishing Venue

The IP.com Prior Art Database

Related People

Michel A Jonqueres: INVENTOR

Abstract

Environment control systems use compressed and cooled air from bleed air systems to feed pressurized and conditioned air to the passenger cabin and cockpit. The problem associated with the existing bleed air systems is that they utilize excess pressure energy to provide the required pressure and flow to the environmental control system (ECS) and other user systems, resulting in wasted pressure energy and higher fuel consumption. Another solution to feed compressed air to the passenger cabin and cockpit is the use of a more electric bleed-less system by using an electric air generation system without bleeding air from the engine. The more electric bleed-less system is inadequate with smaller aircraft where space is limited to install the motor controller components and associated electrical wiring. Thus, an improved bleed air system is required that could overcome the above drawbacks of the existing designs. The proposed 3-port turbo-mixer bleed air system is one such solution for the above mentioned problem. In the proposed system, a set of two of the ports are used to provide matched pressurized air as per the requirement of the ECS, resulting in fuel consumption savings. The proposed system also reduces the weight of the heat exchangers in the ECS. The proposed system is applicable to all engine types such as 2-spool, 3-spool and 2-spool geared turbofan configurations.

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3-Port Turbo-Mixer Systems

Michel A. Jonqueres ABSTRACT

Environment control systems use compressed and cooled air from bleed air systems to feed pressurized and conditioned air to the passenger cabin and cockpit. The problem associated with the existing bleed air systems is that they utilize excess pressure energy to provide the required pressure and flow to the environmental control system (ECS) and other user systems, resulting in wasted pressure energy and higher fuel consumption. Another solution to feed compressed air to the passenger cabin and cockpit is the use of a more electric bleed-less system by using an electric air generation system without bleeding air from the engine. The more electric bleed-less system is inadequate with smaller aircraft where space is limited to install the motor controller components and associated electrical wiring. Thus, an improved bleed air system is required that could overcome the above drawbacks of the existing designs. The proposed 3-port turbo-mixer bleed air system is one such solution for the above mentioned problem. In the proposed system, a set of two of the ports are used to provide matched pressurized air as per the requirement of the ECS, resulting in fuel consumption savings. The proposed system also reduces the weight of the heat exchangers in the ECS. The proposed system is applicable to all engine types such as 2-spool, 3-spool and 2-spool geared turbofan configurations.


1. Introduction

The bleed air system takes hot, pressurized air from a compressor section of the aircraft propulsion gas turbine engine (engine) and provides cooled, pressurized air to the ECS and to other user systems such as the wing anti icing system. When the bleed air system supplies the compressed air to the ECS, the ECS further optimizes the pressure and temperature of the air before providing it to the passenger cabin and cockpit. In the current configuration, engines have been designed with two bleed ports for extracting/bleeding the pressurized air from the engine compressor to feed the ECS and other pneumatic systems. The existing bleed air systems generally provide pressure in


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excess of the need of user systems such as the ECS, resulting in wasted pressure energy. As the compressed air is supplied by the bleed air system, it also affects the fuel consumption of the aircraft engine. Today, where fuel efficiency of commercial aircraft is of interest for the aircraft manufacturers, the above existing system needs to be replaced with a more fuel efficient solution to provide power to the ECS and other user systems.

In one existing solution, a "More Electric" bleed-less system is used in the Boeing 787 airplane. This system uses an electric air generation system to feed the compressed air to the ECS and other user systems and improves the engine efficiency. This system does not necessarily scale properly for smaller airplanes, particularly due to the limited space for installation of the...