scholarly journals Multifunctional Signal Generator for Calibration System of Jet Engine Exhaust Gas Temperature Measurement

2017 ◽  
Vol 47 (1) ◽  
pp. 25-28 ◽  
Author(s):  
Premysl Janu ◽  
Sang Van Doan
Keyword(s):  
Temperature Measurement ◽  
Measurement System ◽  
Power Supply ◽  
Low Voltage ◽  
Proper Function ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
Jet Engine ◽  
Temperature Measurement System ◽  
Exhaust Gas Temperature

One of the most important systems of an aircraft jet engine is exhaust gas temperature measurement system that ensure right function of the engine. Temperature of the gas flowing from the engine turbine is quite high. There is one way, how to measure high temperature and it is by thermocouple. So the main aim of the paper is to describe creation and correct function analysis of a thermocouple simulator. Thermocouple generates very low voltage depending on a temperature that ranges from units micro-volts to several tens of millivolts. Generating of such low voltage using simulator is not easy, because this voltage may move at levels of noise. Voltage generation is performed by digital-analogue converter, which is controlled by a microcontroller via SPI bus. The generated voltage is further reduced to a level corresponding to the voltage output of the thermocouple. Several calibration waveforms are performed belonging to appropriate thermocouple type for multifunctional use. Only positive temperatures are generated, because exhaust gas temperature measurement system is aimed at high temperatures. The power supply circuit offers two options. It is supply from accumulator for its portability or from the laboratory power supply. Surface mounted devices are selected in terms of module miniaturization. The newest device base is chosen for modern design of the module. The temperature waveform is generated by the way of polynomial approximation with correction. Dependence of real generated voltage on the voltage, which is defined by appropriate thermocouple type standard and errors evaluation, is used as a proof of proper function.

scholarly journals RESEARCH ON CHARACTERISTICS OF TURBO JET ENGINE COMBUSTION CHAMBER

Aviation ◽  
2021 ◽  
Vol 25 (1) ◽  
pp. 65-72
Author(s):  
Andrius Dubovas ◽  
Domantas Bručas
Keyword(s):  
Combustion Chamber ◽  
Computer Simulations ◽  
Operating Parameters ◽  
Exhaust Gas ◽  
Jet Engines ◽  
Gas Temperature ◽  
Jet Engine ◽  
Engine Combustion ◽  
Exhaust Gas Temperature ◽  
Combustion Mixture

The characteristics of the combustion chamber of turbo jet engine with various parameters are examined in this article. The scientific works of other authors analyzing operating parameters of the jet engines were reviewed. Their recommendations were considered. Computer simulations of the combustion chamber were performed using different combustion reactions. The exhaust gas temperature and its dependence on the combustion mixture were determined. A practical study was also carried out, during which the experimental exhaust gas temperature was measured, and the trends of temperature change were determined. After analyzing both theoretical and practical results, the conclusions are presented.

Design of Ultrasonic Gas Temperature Measurement System with Humidity Self-Correction

2011 ◽  
Vol 383-390 ◽  
pp. 5166-5170
Author(s):  
Ming Lin Yao ◽  
Yu Jun Guan ◽  
Cui Ying Dong
Keyword(s):  
Temperature Measurement ◽  
Measurement System ◽  
Low Cost ◽  
Ultrasonic Transducer ◽  
Water Vapor Pressure ◽  
Propagation Speed ◽  
Gas Temperature ◽  
Single Chip ◽  
Pressure Meter ◽  
Temperature Measurement System

In the ultrasonic gas temperature measurement system, the principle is that the velocity of sound in gas is a function of temperature. But because the propagation speed of ultrasonic wave can be easily affected by humidity, the accuracy of the gas temperature measurement will be affected too. This dissertation will implement the ultrasonic gas temperature measurement system with humidity correction suitable for all kinds of environment humidity. This type of ultrasonic technique is a highly efficient algorithm with the advantages of both time-of-flight method and phase shift method. And the system is realized with a single-chip microcomputer-based with a relative humidity/water vapor pressure meter. The main advantages of this ultrasonic temperature measurement system are high resolution, using narrow-bandwidth ultrasonic transducer of low cost and ease of implementation.

Design of Wireless Temperature Measurement System for High Voltage Electrical Equipment

2012 ◽  
Vol 591-593 ◽  
pp. 1502-1505
Author(s):  
Xiang Hong Cao ◽  
Chao Yang ◽  
Hua Zhang
Keyword(s):  
Temperature Measurement ◽  
High Voltage ◽  
Measurement System ◽  
Power Supply ◽  
System Analysis ◽  
Electrical Equipment ◽  
Temperature Data ◽  
Working Environment ◽  
Reliable Power Supply ◽  
Temperature Measurement System

There are many limits in the traditional temperature measurement methods' for high voltage electrical equipment. A wireless temperature measurement system based on C8051F340 for high voltage electrical equipment has been designed, which transfers temperature data by wireless communication, and optimizes the system's power supply for the high voltage electrical equipment's working environment. The host computer of the system analysis the temperature data from wireless sensor and can prevent the equipment's overheat accidents in effect. According to the experiment board's practical operating, this system measures temperature accurately, transfers data stably, operates with a reliable power supply and can meet the practical requirements.

Ten Years of Experience With a Small Jet Engine as a Support for Education

2008 ◽  
Vol 131 (1) ◽  
Author(s):  
O. Léonard ◽  
J. P. Thomas ◽  
S. Borguet
Keyword(s):  
Test Bench ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
Convergent Nozzle ◽  
Jet Engine ◽  
Hands On ◽  
Exhaust Gas Temperature ◽  
The University ◽  
Single Flow ◽  
Engine Condition

In 1997 the Turbomachinery Group of the University of Liège decided to acquire a small jet engine to illustrate the courses in propulsion and to provide the students with the opportunity to get some experience on data measurement, acquisition, and interpretation. Among others, the SR-30 engine from Turbine Technology Ltd. Chetek, WI was chosen. It consists of a single spool, single flow engine with a centrifugal compressor, a reversed combustion chamber, an axial turbine, and a fixed convergent nozzle. This engine was installed on a test bench allowing for manual control and providing fuel and oil to the engine. The original setup included measurements of intercomponent pressure and temperatures, exhaust gas temperature, and rotational speed. Since then both the engine and the test bench have been deeply modified. These modifications were led by a triple objective: the improvement and the enrichment of the measurement chain, the widening of the engine’s operational domain, and, last but not the least, the wish to offer appealing hands-on projects to the students. All these modifications were performed at the University of Liège and were conducted by the students as part of their Master theses. Several performance models of the engine were developed to support data validation and engine condition diagnostic. This paper summarizes the developments conducted with and by the students, and presents the experience that was gained by using this engine as a support for education.

Fast Response Exhaust Gas Temperature Measurement in IC Engines

2006 ◽  
Author(s):  
Robert J. Kee ◽  
Peter Hung ◽  
Bryan Fleck ◽  
George Irwin ◽  
Robert Kenny ◽  
...  
Keyword(s):  
Temperature Measurement ◽  
Fast Response ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
Ic Engines ◽  
Exhaust Gas Temperature
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