Air turbine test results for three turbine stages with varying radial distribution of camber

1986 ◽  
Author(s):  
T. FLAHERTY ◽  
A. GOMINHO
Keyword(s):  
Radial Distribution ◽  
Test Results ◽  
Air Turbine

Performance Analysis of the Test Results on a Two-Stage Transonic Fan

1983 ◽  
Vol 105 (1) ◽  
pp. 125-129
Author(s):  
Baoshi Chen ◽  
Tianyi Zhang
Keyword(s):  
Mach Number ◽  
Performance Analysis ◽  
Radial Distribution ◽  
Flow Separation ◽  
High Load ◽  
Test Results ◽  
Two Stage ◽  
Stall Margin ◽  
High Incidence ◽  
Transonic Fan

Test results obtained from a two-stage fan are analysed and the reasons that caused the design performance target not to be attained are presented in this paper. Addition of a partspan shroud on rotor 1 caused higher losses and changed radial distribution of parameters. Modification on the flowpath and chord length of stator 1 resulted in excessively high inlet Mach number and flow separation in the hub region. The high load and high incidence at the hub of rotor 2 caused higher losses and reduced stall margin of the fan.

Experimental Results of Full Scale Air-Cooled Turbine Tests

1976 ◽  
Vol 98 (1) ◽  
pp. 103-113
Author(s):  
H. Nouse ◽  
A. Yamamoto ◽  
T. Yoshida ◽  
H. Nishimura ◽  
K. Takahara ◽  
...  
Keyword(s):  
Axial Flow ◽  
Aircraft Engine ◽  
Aerodynamic Characteristics ◽  
Experimental Results ◽  
Test Results ◽  
Test Apparatus ◽  
Two Stage ◽  
Turbine Cooling ◽  
Turbine Performance ◽  
Air Turbine

In order to investigate several problems associated with the turbine cooling, an air-cooled two-stage axial flow turbine for an aircraft engine application was designed. Aerodynamic characteristics of the two-stage turbine without coolants were obtained first from the cold air turbine tests, and predictions of the turbine performance with supplying of coolants were made using the test results. Following these experiments, cooling tests of the first stage turbine were conducted in the range of turbine inlet gas temperatures lower than 1360 K by the another test apparatus. The descriptions of the turbine and the two test apparatus and the experimental results of the two test turbines are presented. The performance prediction, coolant effects and Reynolds number effect on the turbine performance are also described.

scholarly journals Test results of a 30 kW self-rectifying biradial air turbine-generator prototype

2019 ◽  
Vol 109 ◽  
pp. 187-198 ◽  
Author(s):  
A.A.D. Carrelhas ◽  
L.M.C. Gato ◽  
J.C.C. Henriques ◽  
A.F.O. Falcão ◽  
J. Varandas
Keyword(s):  
Test Results ◽  
Turbine Generator ◽  
Air Turbine

Test Results of 40MW-Class Advanced Humid Air Turbine and Exhaust Gas Water Recovery System

2014 ◽  
Author(s):  
Takuya Takeda ◽  
Hidefumi Araki ◽  
Yasushi Iwai ◽  
Tetsuro Morisaki ◽  
Kazuhiko Sato
Keyword(s):  
Gas Turbine ◽  
Test Facility ◽  
Nox Emissions ◽  
Exhaust Gas ◽  
Water Recovery ◽  
Test Results ◽  
Operational Flexibility ◽  
Start Up ◽  
Air Turbine ◽  
Recovery System

Operational flexibility, such as faster start-up time or faster load change rate, and higher thermal efficiency, have become more and more important for recent thermal power systems. The advanced humid air turbine (AHAT) system has been studied to improve operational flexibility and thermal efficiency of gas turbine power generation systems. A 40MW-class AHAT test facility was built and the rated output was achieved. Through operations at the facility, it has been verified for the first time that the key components of the medium-class gas turbines, such as an axial compressor and multi-can combustor, can be applied to the AHAT system. The cold start-up time from ignition to rated power was about 60 min, which is approximately one-third that of a conventional gas turbine combined cycle (GTCC) plant. NOx emissions were 24ppm (at 16% O2) when the humidity of combustion air was approximately a half that of present commercial AHAT plants, and NOx emissions in a future commercial AHAT system were thought to be less than 10ppm. A water recovery system which recovers water from a part of the exhaust gas of the 40MW-class test facility was built and test operations were made from June 2013. In this paper, water recovery test results as well as the 40MW-class gas turbine test results are shown.

Test results of a novel twin-rotor radial inflow self-rectifying air turbine for OWC wave energy converters

Energy ◽  
2019 ◽  
Vol 170 ◽  
pp. 869-879 ◽  
Author(s):  
Bárbara S. Lopes ◽  
Luís M.C. Gato ◽  
António F.O. Falcão ◽  
João C.C. Henriques
Keyword(s):  
Wave Energy ◽  
Test Results ◽  
Wave Energy Converters ◽  
Air Turbine ◽  
Twin Rotor ◽  
Energy Converters

scholarly journals An Advanced Microturbine System with Water-Lubricated Bearings

2009 ◽  
Vol 2009 ◽  
pp. 1-12 ◽  
Author(s):  
Susumu Nakano ◽  
Tadaharu Kishibe ◽  
Tomoaki Inoue ◽  
Hiroyuki Shiraiwa
Keyword(s):  
Gas Turbines ◽  
High Performance ◽  
Unique Feature ◽  
Laboratory Evaluation ◽  
Air Cooling ◽  
Test Results ◽  
Air Turbine ◽  
Operation Test ◽  
Load Tests ◽  
Electrical Output

A prototype of the next-generation, high-performance microturbine system was developed for laboratory evaluation. Its unique feature is its utilization of water. Water is the lubricant for the bearings in this first reported application of water-lubricated bearings in gas turbines. Bearing losses and limitations under usage conditions were found from component tests done on the bearings and load tests done on the prototype microturbine. The rotor system using the water-lubricated bearings achieved stable rotating conditions at a rated rotational speed of 51,000 rpm. An electrical output of 135 kW with an efficiency of more than 33% was obtained. Water was also utilized to improve electrical output and efficiency through water atomizing inlet air cooling (WAC) and a humid air turbine (HAT). The operation test results for the WAC and HAT revealed the WAC and HAT operations had significant effects on both electrical output and electrical efficiency.

Test and Theory for Piezoelectric Actuator-Active Vibration Control of Rotating Machinery

1991 ◽  
Vol 113 (2) ◽  
pp. 167-175 ◽  
Author(s):  
A. B. Palazzolo ◽  
R. R. Lin ◽  
R. M. Alexander ◽  
A. F. Kascak ◽  
J. Montague
Keyword(s):  
Vibration Control ◽  
System Reliability ◽  
Active Vibration Control ◽  
Piezoelectric Actuators ◽  
Rotating Machinery ◽  
Test Results ◽  
Endurance Test ◽  
Jet Engine ◽  
Air Turbine ◽  
Active Vibration

The application of piezoelectric actuators for active vibration control (AVC) of rotating machinery is examined. Theory is derived and the resulting predictions are shown to agree closely with results of tests performed on the air turbine driven-overhung rotor. The test results show significant reduction in unbalance, transient, and subsynchronous responses. Results from a 30 hour endurance test support the AVC system reliability. Various aspects of the electromechanical stability of the control system are also discussed and illustrated. Finally, application of the AVC system to an actual jet engine is discussed.

Structures and crystallization of vacuum-deposited amorphous Se and Sb films

1990 ◽  
Vol 48 (4) ◽  
pp. 140-141
Author(s):  
Makoto Shiojiri ◽  
Toshiyuki Isshiki ◽  
Tetsuya Fudaba ◽  
Yoshihiro Hirota
Keyword(s):  
Monte Carlo ◽  
Electron Microscope ◽  
Monte Carlo Method ◽  
Computer Program ◽  
Radial Distribution ◽  
Film Formation ◽  
Amorphous State ◽  
Two Dimensional ◽  
Amorphous Films ◽  
Binding Condition

In hexagonal Se crystal each atom is covalently bound to two others to form an endless spiral chain, and in Sb crystal each atom to three others to form an extended puckered sheet. Such chains and sheets may be regarded as one- and two- dimensional molecules, respectively. In this paper we investigate the structures in amorphous state of these elements and the crystallization.HRTEM and ED images of vacuum-deposited amorphous Se and Sb films were taken with a JEM-200CX electron microscope (Cs=1.2 mm). The structure models of amorphous films were constructed on a computer by Monte Carlo method. Generated atoms were subsequently deposited on a space of 2 nm×2 nm as they fulfiled the binding condition, to form a film 5 nm thick (Fig. 1a-1c). An improvement on a previous computer program has been made as to realize the actual film formation. Radial distribution fuction (RDF) curves, ED intensities and HRTEM images for the constructed structure models were calculated, and compared with the observed ones.

Using Conventional Articulation Tests With Highly Unintelligible Children

1992 ◽  
Vol 23 (1) ◽  
pp. 52-60 ◽  
Author(s):  
Pamela G. Garn-Nunn ◽  
Vicki Martin
Keyword(s):  
Test Results ◽  
Phonological Processes ◽  
Rule Based ◽  
Severity Level ◽  
Error Sensitivity ◽  
Conventional Tests ◽  
Severity Levels ◽  
Conventional Test ◽  
Impaired Children

This study explored whether or not standard administration and scoring of conventional articulation tests accurately identified children as phonologically disordered and whether or not information from these tests established severity level and programming needs. Results of standard scoring procedures from the Assessment of Phonological Processes-Revised, the Goldman-Fristoe Test of Articulation, the Photo Articulation Test, and the Weiss Comprehensive Articulation Test were compared for 20 phonologically impaired children. All tests identified the children as phonologically delayed/disordered, but the conventional tests failed to clearly and consistently differentiate varying severity levels. Conventional test results also showed limitations in error sensitivity, ease of computation for scoring procedures, and implications for remediation programming. The use of some type of rule-based analysis for phonologically impaired children is highly recommended.

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