- Tytuł:
- Research of the influence of marine diesel engine Sulzer AL 25/30 load on theTDC position on the indication graph
- Autorzy:
-
Pawletko, R.
Polanowski, S. - Powiązania:
- https://bibliotekanauki.pl/articles/247411.pdf
- Data publikacji:
- 2010
- Wydawca:
- Instytut Techniczny Wojsk Lotniczych
- Tematy:
-
kinematic TDC determination
load influence on TDC position - Opis:
- The article presents the research results of load influence on errors of the piston Top Dead Centre (TDC) position determined on indication graph with combustion. For TDC determination the method proposed by Polanowski is applied. This method is based on least-squares approximation with model of thermodynamic compression using apolynomial exponent. So, designated TDC are kinematics. This method make possible determination the TDC on the indicator diagram with combustion, as well as the total compression ratio and the dynamic error of pressure (offset). Research were done on the laboratory engine Sulzer 3AL25/30 for load range of 50-250 kW and rotational speed 750 rpm, which corresponds to 15-90% nominal load. Cylinder pressures were recorded with a resolution ofn O.5 OWK by means of multichannel recorder UNITEST 205. For pressure measurements were applied strain gauge pressure sensors Spais Company. For the analysis of indicator diagrams used its own specially developed algorithm and program for the automatic determination of TDC, based on the model of the compression process with the exponent of the polynomial. Simultaneously three parameters were determined: the position of TDC, the total compression ratio and offset the pressure. Additionally set the position of the zeros of the second order derivatives, which are sometimes considered as reference points to TDC of pistons. For smoothing of indicator diagrams their own algorithms and programs of moving approximation by polynomials of 3rd degree was used. The results of research have shown the essential load influence on the errors of TDC positions on indicator diagrams.
- Źródło:
-
Journal of KONES; 2010, 17, 3; 361-368
1231-4005
2354-0133 - Pojawia się w:
- Journal of KONES
- Dostawca treści:
- Biblioteka Nauki
Artykuł