POLITECHNIKA RZESZOWSKA
ZPSiSS
Sprawozdanie z laboratorium silników spalinowych
Wyznaczanie charakterystyki ogólnej silnika.
IV MDE
Gr.33
1.Wiadomości teoretyczne
Charakterystykę ogólną opracowuje się na podstawie kompletu charakterystyk obciążeniowych lub charakterystyk mocy częściowej oraz charakterystyki zewnętrznej. Najpierw przeprowadza się krzywe stałej mocy użytecznej Ne, które stanowią rodzinę hiperboli o równaniu
pe -średnie ciśnienie użyteczne;
n - prędkość obrotowa;
r - liczba suwów silnika;
Vss -pojemność skokowa silnika;
Ne - moc użyteczna;
C - stała przybierająca różne wartości dla poszczególnych hiperboli;
Następnie przez punkty o współrzędnych (pe,n) przeprowadza się krzywe stałego jednostkowego zużycia paliwa. Pe oblicza się w zależności od Ne i współrzędnej n , które znajdują się na poszczególnych charakterystykach obciążeniowych dla przyjmowanych kolejno wartości jednostkowego zużycia paliwa.
Tabela danych
n=2500 |
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P[N] |
Tzs[oC] |
Tzs[K] |
Ppary[kPa] |
Po[kPa] |
Ka |
Ne[kW] |
t[s] |
Gh[kg/h] |
Ghapr |
ge [g/kWh] |
pe [kPa] |
0,0 |
16,0 |
289,150 |
1,810 |
98,454 |
0,989 |
0,000 |
151 |
1,746 |
1,778 |
#DZIEL/0! |
0,000 |
9,0 |
17,0 |
290,150 |
1,936 |
98,328 |
0,992 |
4,306 |
102 |
2,594 |
2,559 |
594,327 |
13,839 |
18,0 |
15,0 |
288,150 |
1,700 |
98,564 |
0,985 |
8,552 |
75 |
3,504 |
3,399 |
397,379 |
27,291 |
26,0 |
15,0 |
288,150 |
1,700 |
98,564 |
0,985 |
12,354 |
65 |
4,043 |
4,208 |
340,623 |
39,421 |
35,0 |
15,0 |
288,150 |
1,700 |
98,564 |
0,985 |
16,630 |
50 |
5,256 |
5,184 |
311,732 |
53,066 |
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n=3000 |
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P[N] |
Tzs[oC] |
Tzs[K] |
Ppary[kPa] |
Po[kPa] |
Ka |
Ne[kW] |
t[s] |
Gh[kg/h] |
Ghapr |
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pe [kPa] |
0,0 |
12,0 |
285,150 |
1,400 |
98,864 |
0,976 |
0,000 |
121 |
2,150 |
1,973 |
#DZIEL/0! |
0,000 |
9,5 |
14,0 |
287,150 |
1,597 |
98,667 |
0,982 |
5,398 |
120 |
2,183 |
2,680 |
496,434 |
14,308 |
21,0 |
15,0 |
288,150 |
1,700 |
98,564 |
0,985 |
11,973 |
62 |
4,238 |
3,888 |
324,723 |
31,840 |
32,5 |
16,0 |
289,150 |
1,810 |
98,454 |
0,989 |
18,594 |
46 |
5,732 |
5,489 |
295,197 |
49,614 |
46,0 |
16,0 |
289,150 |
1,810 |
98,454 |
0,989 |
26,317 |
37 |
7,126 |
7,844 |
298,047 |
70,223 |
52,0 |
18,0 |
291,150 |
2,062 |
98,202 |
0,996 |
29,965 |
28 |
9,485 |
9,139 |
304,973 |
80,536 |
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n=3500 |
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P[N] |
Tzs[oC] |
Tzs[K] |
Ppary[kPa] |
Po[kPa] |
Ka |
Ne[kW] |
t[s] |
Gh[kg/h] |
Ghapr |
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pe [kPa] |
2,0 |
17,0 |
290,150 |
1,936 |
98,328 |
0,992 |
1,148 |
100 |
2,646 |
2,766 |
2408,282 |
2,636 |
10,0 |
18,0 |
291,150 |
2,062 |
98,202 |
0,996 |
5,763 |
75 |
3,541 |
3,544 |
615,071 |
13,275 |
20,0 |
18,0 |
291,150 |
2,062 |
98,202 |
0,996 |
11,525 |
52 |
5,107 |
4,732 |
410,603 |
26,550 |
32,0 |
18,0 |
291,150 |
2,062 |
98,202 |
0,996 |
18,440 |
41 |
6,478 |
6,473 |
351,043 |
42,480 |
40,0 |
19,0 |
292,150 |
2,196 |
98,068 |
0,999 |
23,136 |
36 |
7,405 |
7,852 |
339,379 |
53,494 |
51,0 |
19,0 |
292,150 |
2,196 |
98,068 |
0,999 |
29,498 |
26 |
10,253 |
9,973 |
338,085 |
68,205 |
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n=4000 |
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P[N] |
Tzs[oC] |
Tzs[K] |
Ppary[kPa] |
Po[kPa] |
Ka |
Ne[kW] |
t[s] |
Gh[kg/h] |
Ghapr |
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pe [kPa] |
0,0 |
14,0 |
287,150 |
1,597 |
98,667 |
0,982 |
0,000 |
82 |
3,202 |
3,279 |
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0,000 |
9,0 |
17,0 |
290,150 |
1,936 |
98,328 |
0,992 |
5,168 |
65 |
4,053 |
4,076 |
788,831 |
10,379 |
19,0 |
17,0 |
290,150 |
1,936 |
98,328 |
0,992 |
10,910 |
47 |
5,583 |
5,294 |
485,293 |
21,912 |
31,0 |
18,0 |
291,150 |
2,062 |
98,202 |
0,996 |
17,864 |
37 |
7,178 |
7,237 |
405,139 |
36,009 |
41,5 |
19,0 |
292,150 |
2,196 |
98,068 |
0,999 |
24,003 |
30 |
8,886 |
9,379 |
390,728 |
48,563 |
48,0 |
18,0 |
291,150 |
2,062 |
98,202 |
0,996 |
27,660 |
24 |
11,159 |
10,844 |
392,048 |
55,755 |
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n=4500 |
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P[N] |
Tzs[oC] |
Tzs[K] |
Ppary[kPa] |
Po[kPa] |
Ka |
Ne[kW] |
t[s] |
Gh[kg/h] |
Ghapr |
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pe [kPa] |
4,5 |
14,0 |
287,150 |
1,597 |
98,667 |
0,982 |
2,557 |
105 |
2,494 |
3,154 |
1233,450 |
4,518 |
7,0 |
17,0 |
290,150 |
1,936 |
98,328 |
0,992 |
4,019 |
60 |
4,411 |
3,731 |
928,360 |
7,176 |
14,0 |
17,0 |
290,150 |
1,936 |
98,328 |
0,992 |
8,039 |
49 |
5,401 |
5,267 |
655,264 |
14,351 |
20,0 |
18,0 |
291,150 |
2,062 |
98,202 |
0,996 |
11,525 |
40 |
6,640 |
6,540 |
567,426 |
20,650 |
31,0 |
19,0 |
292,150 |
2,196 |
98,068 |
0,999 |
17,930 |
32 |
8,330 |
8,731 |
486,954 |
32,245 |
43,0 |
18,0 |
291,150 |
2,062 |
98,202 |
0,996 |
24,779 |
24 |
11,066 |
10,866 |
438,505 |
44,398 |
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n=5000 |
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P[N] |
Tzs[oC] |
Tzs[K] |
Ppary[kPa] |
Po[kPa] |
Ka |
Ne[kW] |
t[s] |
Gh[kg/h] |
Ghapr |
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pe [kPa] |
0,0 |
17,0 |
290,150 |
1,936 |
98,328 |
0,992 |
0,000 |
84 |
3,175 |
6,145 |
#DZIEL/0! |
0,000 |
8,5 |
18,0 |
291,150 |
2,062 |
98,202 |
0,996 |
8,164 |
47 |
5,675 |
5,928 |
726,107 |
13,164 |
14,0 |
19,0 |
292,150 |
2,196 |
98,068 |
0,999 |
13,496 |
41 |
6,505 |
6,325 |
468,677 |
21,844 |
23,0 |
19,0 |
292,150 |
2,196 |
98,068 |
0,999 |
22,172 |
33 |
8,207 |
7,883 |
355,562 |
35,886 |
32,0 |
19,0 |
292,150 |
2,196 |
98,068 |
0,999 |
30,847 |
27 |
9,806 |
10,571 |
342,675 |
49,928 |
48,0 |
20,0 |
293,150 |
2,337 |
97,927 |
1,003 |
46,446 |
15 |
17,781 |
18,242 |
392,758 |
75,460 |