analysis of water injection into high-temperature mixture of ...

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55Temperature (K)220019001600130010007004001000.1Nw/Nf0.15Nw/Nf0.2Nw/Nf1000 1500 2000 2500RPMFIGURE 4-37 The temperature change of water injected with Engine speedTemperature (K)-7.00-6.00-5.00-4.00-3.00-2.000.1Nw/Nf0.15Nw/Nf0.2Nw/Nf1000 1500 2000 2500RPMFIGURE 4-38 The temperature change of gases burned with Engine speedAccording to Figure 4-37, it can be seen that the relative temperature change ofwater injected increases, which can be seen from the curves are almost the same. Atlow engine speed, the temperature change of water injected is higher that at highengine speed due to more time for the heat loses into water zone. Thus, thetemperature change of water injected must be increased and led to increase in thetemperature of gases burned varied which with the different molar water injectionfuelratio. However, it is very less change of gases burned with different molar waterinjection-fuel ratio, because this case was used in the simulation with the same ofcompression ration and equivalence ratio, Thus ,these are equally mass of waterinjected and volume of water zone under the equally pressure.
56Thus, the temperature changes of water injected are almost the same value,following Figure 4-38. It follows a similar trend from the section 4.6.1.3. Results areapproximately increased value of 300-2000 K per 1 CA of water injected anddecreased valued of 0.31-0.34 K per 1 CA of gas burned, these depend on enginespeed.
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ANALYSIS OF WATER INJECTION INTO HI
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Thesis CertificateThe Graduate Coll
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ชื่อ : นายปรม
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TABLE OF CONTENTSPageAbstract (in E
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LIST OF TABLESTablePage3-1 Solution
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LIST OF FIGURES (CONTINUED)FigurePa
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LIST OF ABBREVIATIONS, SYMBOLS AND
Page 15 and 16:
CHAPTER 1INTRODUCTION1.1 Background
Page 17 and 18: 31.6.6 Water injected is assumed to
Page 19 and 20: 6for these working fluid models can
Page 22 and 23: CHAPTER 3METHODOLOGY FOR ANALYSIS O
Page 24 and 25: 11perform the necessary calculation
Page 26 and 27: 13h b P T w−0.2 0.8 −0.55 0.8=
Page 28 and 29: 15the procedure required Nitrogen(
Page 30 and 31: 171N22 NEq.3-461 1O+2N2 NOEq.3-472
Page 32 and 33: 19∂y1 cy ∂y1 cy ∂y 1 c ∂y 1
Page 34 and 35: 211/2( cy )∂y ∂∂c ∂y∂T
Page 36 and 37: 23[ A][ ∂y/ ∂ P] + [ ∂f / ∂
Page 38 and 39: 25⎛ • • •ln ln ⎞⎛⎞( )
Page 40 and 41: 27( θ= −π)θ>θ bθ>θ W( θ=π
Page 42 and 43: CHAPTER 4RESULTS AND DISCUSSIONThis
Page 44 and 45: 31FIGURE 4-1 Comparison of an actua
Page 46 and 47: 33FIGURE 4-4 Schematic of the port
Page 48 and 49: 35Temperature (K)250023002100190017
Page 50 and 51: 37cylinder temperature. So, a more
Page 52 and 53: 39Thermal efficiency (%)43424140393
Page 54 and 55: 41Theoretically, the high useful co
Page 58 and 59: 45injection-fuel ratio increases gr
Page 62 and 63: 49When considering relative tempera
Page 64 and 65: 51Temperature (K)240021001800150012
Page 66 and 67: 53When considering relative tempera
Page 70 and 71: CHAPTER 5CONCLUSIONS AND SUGGESTION
Page 72 and 73: REFERENCES1. Ricardo, H.R. The High
Page 74: APPENDIX ADerivative equations of i
Page 78 and 79: 64TABLE A-3 Curve fit coefficients
Page 80 and 81: 66TABLE A-5 Curve fit coefficients
Page 82 and 83: 68The following is the derivative v
Page 84 and 85: 70From the definition of entropyh =
Page 86 and 87: 72• ⎛ ⎞ • ⎛Tb∂u •b∂
Page 88 and 89: 74• ⎛1 ⎞ •∂u ⎛∂ ∂
Page 90 and 91: 76⎛ • • •ln ln ⎞⎛⎞( )
Page 92 and 93: 78The following is the derivative v
Page 94 and 95: 80From the definition of entropy h
Page 96 and 97: 82• ⎛ Tb u ⎞ • • ⎛bmTb
Page 98 and 99: 84• ⎛1 ⎞ • •∂u ⎛ ⎞
Page 100 and 101: 86• • • ⎛ u ⎞bmb( hW ub)
Page 102 and 103: 88Appendix D MATLAB program scripts
Page 104 and 105: 90[thetawater,pTbWQlHl2]=ode45('Rat
Page 106 and 107: 92-0.69353550E-14 -0.14245228E+05 0
Page 108 and 109: 940.21*(1-phi) 0 0]';dcdT=0;else %
Page 110 and 111: 96dfdp=zeros(4,1);dYdT=zeros(11,1);
Page 112 and 113: 98dcdT(1)=-dKdT(1)*sqrt(patm)/K(1)^
Page 114 and 115: 100Iter=Iter+1;[hb,u,v,s,Y,cp,dlvlT
Page 116 and 117: 102yprime(2)=-Const1/cpb/x*Qconvb+v
Page 118 and 119:
104masswaterin=massfuel*mwpmf;% Tot
Page 120 and 121:
106savefile = 'Volume.mat';RTWV=RTW
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108p=pTarray(:,1);T=pTarray(:,2);hc
Page 124 and 125:
110gamma_der_tautau = 0;for i = 1 :
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