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Here, we review the special features of the combustion efficiency in the diesel engine with anadjustable turbocharger prototype with vaneless turbine volute in mode with P e = 67.8 kW andn = 1250 rpm. The reduction of the effective cross-section area of the end of the turbine voluteacceleration section A improves the in-cylinder mixture formation and combustion processes in thismode. It is confirmed by the shape of the averaged indicated diagram shown in Figure 5.Figure 5. Dependence of temperature and pressure in the cylinder of the engine on the mode withP e = 67.8 kW and n = 1250 rpmThe change in the main indices of the experimental diesel engine in relation to the value of effectivecross-section A, is shown in Figure 6. As seen in the figure, a reduction in the value of A leads toimprovement of all indices that characterize the combustion efficiency. Here, SCF improved by 4.5%g/kWh, the Lambda increased from 1.26 to 1.38 (Figure 6 b), and the indicated efficiency rose by 3.5%(Figure 6 f).Therefore, in the case of studded mode, the efficiency of turbine adjustment with vaneless turbinevolute is mostly evident in modes with high load and low engine speed. In such modes it is necessary todecrease the value of A thus increasing the Lambda and improving the quality of the combustionefficiency as seen in Figure 6.5.2. Results of experimental investigation of diesel engine with the prototype of VGT running ontorque and power modesExperimental investigations were held on a four cylinder diesel engine specified in section 3. Enginewas running on a torque and power curve modes. Adjustment of VGT was conducted in the range ofengine speeds from 1250 to 1800 rpm. Two algorithms of VGT adjustment were used: to get a constantpower curve for diesel engine and a constant torque curve for it.56
Figure 6. Dependence of main indices of experimental diesel on the value of effective cross-section A on the mode P e= 67.8 kW and n =1250 rpmFigure 7 shows the results of experimental investigation as dependences of main diesel indicesequipped with commercial and adjustable turbochargers. Prototype of VGT turbocharger was adjusted forconstant power curve. As seen from Figure 7 b, VGT adjustment allows not only to improve BSFC butalso to increase adjustability factor by 9.7 % (from 674 Nm to 747.2 Nm). As a result the constant powercurve was obtained in the range of engine speeds from 1500 to 2000 rpm. Higher power output in the57
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ESTONIAN MARITIME ACADEMYLATVIAN MA
Page 3 and 4:
CONTENTSRoberts GailītisASSESSMENT
Page 5 and 6: 1. The aim of research and methodol
Page 7 and 8: Figure 2. Age structure of merchant
Page 9 and 10: their maritime education, takes dec
Page 11 and 12: Therefore it can be concluded that
Page 13 and 14: MULTI ZONES HVAC SYSTEMS’ CONTROL
Page 15 and 16: Figure 1. Multi-zone air-conditioni
Page 17 and 18: The control mechanism of the mathem
Page 19 and 20: Results and discussionThe temperatu
Page 21 and 22: PREDICTION OF EMISSIONS AND PERFORM
Page 23 and 24: In order to measure brake torque, t
Page 25 and 26: Predicted & Actual Values of SFC, g
Page 27 and 28: 8. Canakci, M., Ozsezen, A.N., Arca
Page 29 and 30: It is appropriate to systemize the
Page 31 and 32: Protestant ideology as an eventual
Page 33 and 34: thinking is innovative, responsible
Page 35 and 36: 17. Professoren-Protest gegen 10 Ja
Page 37 and 38: affected by competing ports [2]. Ne
Page 39 and 40: Tendencies of cargo flows volume an
Page 41 and 42: increase, inflation decreases, beca
Page 43 and 44: 4. Belova, J., Mickiene, R. Economi
Page 45 and 46: Description of researchIf volume co
Page 47 and 48: p p 1 10(11)C021Here, C1is a speed
Page 49 and 50: Figure 4. Dependence of pressure on
Page 51 and 52: EXPERIMENTAL INVESTIGATIONS OF IC D
Page 53 and 54: Figure 2. Prototype of variable geo
Page 55: 4. Experimental equipment and softw
Page 59 and 60: Figure 8. Dependence of main indice
Page 61 and 62: DEVELOPMENT AND APPLICATION OF SIMU
Page 63 and 64: program was developed regarding the
Page 65 and 66: F11: High sea water pressure alarmF
Page 67 and 68: In the main interface as given in F
Page 69 and 70: Figure 7. Failure mode selection sc
Page 71 and 72: Figure 11. Causes of failure select
Page 73 and 74: 6. Xiaoyan, X., Min, H., Huayao, Z.
Page 75 and 76: Asia region is fastest developing n
Page 77 and 78: performance of design. Speed is the
Page 79 and 80: In summary, it can be said that wor
Page 81 and 82: ReferencesArticles1. Belova, J., Mi
Page 83 and 84: Grain cargo life cycleGrains are ca
Page 85 and 86: Maritime law is made and enforced b
Page 87 and 88: European and Asian countries, and e
Page 89 and 90: EVALUATION OF IMO SECOND GENERATION
Page 91 and 92: Sample vessel: a container shipA co
Page 93 and 94: Natural roll frequency in calm wate
Page 95 and 96: REQUIREMENTS FOR THE MANUSCRIPTSSUB
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