203 Improvement of the probe for simultaneous measurement of two velocity components and static pressure for the characterization of velocity and pressure fluctuations in two dimensional turbulent jet

2010 ◽  
Vol 2010.59 (0) ◽  
pp. 77-78
Author(s):  
Yuki KOJIMA ◽  
Yasuhiko SAKAI ◽  
Kouji NAGATA ◽  
Osamu TERASHIMA ◽  
Takashi KUBO
Keyword(s):  
Simultaneous Measurement ◽  
Static Pressure ◽  
Pressure Fluctuations ◽  
Turbulent Jet ◽  
Two Dimensional

S054071 The Simultaneous Measurement of Three Velocity Components and Static Pressure in a Two Dimensional Jet

2011 ◽  
Vol 2011 (0) ◽  
pp. _S054071-1-_S054071-4
Author(s):  
Kazuhiro ONISHI ◽  
Osamu TERAHIMA ◽  
Yasuhiko SAKAI ◽  
Kouji NAGATA
Keyword(s):  
Simultaneous Measurement ◽  
Static Pressure ◽  
Two Dimensional

S0502-1-2 Study on the two-dimensional liquid phase turbulent jet with the reaction : A trial of simultaneous measurement of concentration and velocity

2010 ◽  
Vol 2010.2 (0) ◽  
pp. 145-146
Author(s):  
Hiroki YASUHARA ◽  
Yasuhiko SAKAI ◽  
Takashi KUBO ◽  
Kouji NAGATA ◽  
Osamu TERASHIMA
Keyword(s):  
Liquid Phase ◽  
Simultaneous Measurement ◽  
Turbulent Jet ◽  
Two Dimensional

1909 Trial of simultaneous measurement of two velocity components and pressure field in two dimensional turbulent jet

2008 ◽  
Vol 2008.2 (0) ◽  
pp. 217-218
Author(s):  
Yuki KOJIMA ◽  
Takaaki KATO ◽  
Yasuhiko SAKAI ◽  
Kouji NAGATA ◽  
Takashi KUBO
Keyword(s):  
Simultaneous Measurement ◽  
Pressure Field ◽  
Turbulent Jet ◽  
Two Dimensional

Acoustic characterization of combustion chambers in reciprocating engines: An application for low knocking cycles recognition

2020 ◽  
pp. 146808742098056
Author(s):  
Ricardo Novella ◽  
Benjamín Pla ◽  
Pau Bares ◽  
Irina Jiménez
Keyword(s):  
Combustion Chamber ◽  
Pressure Fluctuations ◽  
Recognition System ◽  
Turbulent Jet ◽  
Order System ◽  
Resonance Oscillation ◽  
Acoustic Response ◽  
Viscous Effects ◽  
Combustion Chambers

In this paper the acoustic response of a combustion chamber is studied by assuming different pressure field excitation. The viscous effects on the combustion chamber and the finite impedance of the walls have been modeled with a first order system, which damps the resonance oscillation created by combustion. The characterization of the acoustic response of the combustion chamber has been used to identify the source of the excitation in order to distinguish normal combustion from knock. Two engines, a conventional spark ignited (SI) and a turbulent jet ignition (TJI) engine, were used, fueled with gasoline and compressed natural gas (CNG), respectively. The pressure fluctuations in the combustion chambers are analyzed and a pattern recognition system identifies the most likely source of excitation. This new criteria for knock identification permits a more consistent differentiation between knocking and no-knocking cycles, independent on the amplitude of the phenomenon, thus allowing the improvement for knock control algorithms, specially with combustion modes which heavily excite resonance, such as turbulent jet ignition or homogeneous charge compression ignition (HCCI).

353 On the fluctuation characteristic of velocity and static pressure in two dimensional turbulent jet

2008 ◽  
Vol 2008.57 (0) ◽  
pp. 221-222
Author(s):  
Takaaki KATO ◽  
Yasuhiko SAKAI ◽  
Kouji NAGATA ◽  
Takashi KUBO ◽  
Tomohide NIIMI
Keyword(s):  
Static Pressure ◽  
Turbulent Jet ◽  
Two Dimensional ◽  
Fluctuation Characteristic
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