Jiří Pečinka

Možnosti užití netkané textilie Evolon® CR při restaurování malířských uměleckých děl a papíru na vybraných objektech ze sbírek Muzea hlavního města Prahy

Jiří Pečinka

Cílem článku je seznámit čtenáře s možnostmi užití netkané textilie Evolon® CR v restaurování. Zaměřuje se na možnosti snímání či redukce lakových vrstev, přemaleb a povrchových nečistot z povrchu malířských děl na textilní i papírové podložce a polychromovaných dřevěných soch. Jsou předloženy …

Restaurování souboru malířských uměleckých děl na papíru

Jiří Pečinka

Práce představuje výsledky komplexního restaurátorského zásahu na dvou objektech. Prvním je malba na papírové podložce podlepená plátnem vsazená do ozdobného rámu. Malba zobrazuje XIV. zastavení křížové cesty z kaple Panny Marie v obci Rok u Sušice. Na tuto část navazuje kulturně-historický průzkum, …

Influence of Fouling on Compressor Dynamics: Experimental and Modeling Approach

Gbanaibolou Jombo, Jiří Pečinka, Suresh Sampath, David Mba

The effect of compressor fouling on the performance of a gas turbine has been the subject of several papers; however, the goal of this paper is to address a more fundamental question of the effect of fouling, which is the onset of …

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Small Jet Engine Centrifugal Compressor Stability Margin Assessment

Jiří Pečinka, Adolf Jílek, Petr Kmoch

Centrifugal compressors with low and moderate pressure ratio usually have characteristic with a wider stable operating region. Flat speed lines allow substantial reduction of the air mass flow rate with almost constant pressure ratio and without sudden surge occurrence. The surge is …

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Air flow rate measurement with various differential pressure methods

T. Nagy, Adolf Jílek, Jiří Pečinka

There are various differential pressure methods to measure the air flow rate in a closed duct. These methods are defined by ISO standards, thus providing measurement with high accuracy. General practise for air flow rate measurements with gas turbine engines is to …

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Analysis of engine monitoring system report

Ondřej Volný, Jiří Pečinka

Electronic engine monitoring systems are used by both civilian and military aircraft operators as a significant support of the condition based maintenance systems. Presented paper describes monitoring system report and analysis of engine usage data of the Honeywell F-124 engine. System of …

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JET ENGINE INLET DISTORTION SCREEN AND DESCRIPTOR EVALUATION

Jiří Pečinka, Gabriel T. Bugajski, Petr Kmoch, Adolf Jílek

Total pressure distortion is one of the three basic flow distortions (total pressure, total temperature and swirl distortion) that might appear at the inlet of a gas turbine engine (GTE) during operation. Different numerical parameters are used for assessing the total pressure …

Measurement automation for small jet engine testing

Jakub Hnidka, Jiří Pečinka

For a small gas turbine engine test cell newly developed and built at the University of Defence in Brno a system for automated measurement and engine test control was designed. The system is based on National Instruments Compact RIO hardware and LabVIEW …

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Small engine inlet distortion testing device

Jiří Pečinka, Gabriel T. Bugajski, Adolf Jílek, Petr Kmoch

A project dealing with small gas turbine engine inlet total pressure distortion testing was solved at the University of Defence. Within this project a new device for creation and measurement of the total pressure inlet distortion was designed. In the early stage …

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TJ100 inlet distortion testing

Gabriel T. Bugajski, Jiří Pečinka, Adolf Jílek, Petr Kmoch

This paper describes the measurement of total pressure distortion of the TJ100 engine inlet and its influence on engine operation. The pressure distortion was generated by a specially designed distortion screen. Measurement was performed at different engine speeds. An example of the …

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Experimental Evaluation of Small GTE Test Bed

Jiří Pečinka, Adolf Jílek, Gabriel T. Bugajski

Staff at the University of Defence in Brno, Czech Republic, designed and constructed a test cell for small gas turbine engines as detailed in GT2012-69419. Once construction was completed, the test cell was instrumented and put through a series of tests to …

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Preliminary Design of a Low-Cost Mobile Test Cell for Small Gas Turbine Engines

Jiří Pečinka, Adolf Jílek

This paper describes the design considerations and calculations of a mobile low-cost test cell for small gas turbine engines (GTE). The test bed was designed for the TS-20 jet engine, originated in a gas turbine starter and should be used mostly for …

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