鍦ㄤ竴鑷�(t谩i)娉电殑鍚稿叆鍋�(c猫)鐨勫鍔涗綆锛屽彲鑳芥渻(hu矛)閬囧埌娴侀珨娌搁ò锛屽彲鑳芥渻(hu矛)灏�(d菐o)鑷�
娌搁ò闁嬪鏅�(sh铆)锛屽湪娑查珨涓殑澹撳姏闄嶄綆鐨勬祦楂旂殑瀵�(sh铆)闅涙韩搴︿笅鐨勮捀姘ｅ銆�
鐐轰簡琛ㄥ緛娼涘湪鐨勬哺榛�(di菐n)鍙婃埃铦�锛屽湪娉电殑鍚稿叆鍋�(c猫)涓婄殑绺藉闋� - 闈犺繎钁夎吉锛屽拰娑查珨鐨勫(sh铆)闅涙韩搴︿笅鐨勮捀姘ｅ涔嬮枔鐨勫樊鍒�锛岄兘鍙互浣跨敤銆�
鍚搁牠
鍦ㄩ潬杩戣憠杓殑娴侀珨鐨勮兘閲忔柟绋� - 鎶藉惛闋殑鍩虹(ch菙)涓婄殑闈滄厠(t脿i)鍜岄�熷害闋殑绺藉拰鍙〃绀虹偤锛�
H S = P S /γ+ V S 2/2鍏嬶紙1锛�
H S =鍚搁牠闈犺繎钁夎吉
P S =鍦ㄦ祦楂斾腑璺濋洟鎵�杩拌憠杓殑闈滃
γ =娴侀珨鐨勬瘮閲�
V S =娴侀珨閫熷害
G = 閲嶅姏鍔犻�熷害
娑查珨钂告埃闋�
瀵�(sh铆)闅涙韩搴︿笅鐨勬恫楂旂殑钂告埃鍙互琛ㄧず鐐猴細
H V = 楂旂⿳/γ锛�2锛�
H V =钂告苯闋�
P V =钂告苯澹撳姏
娉ㄦ剰浜嗗湪娴侀珨涓殑钂告苯澹撳姏鍙栨焙浜庢韩搴︼紝 姘� 锛屾垜鍊戞渶甯歌鐨勬祦楂�锛屽湪20鈩冮枊濮嬫哺楱�锛屽鏋滃湪娴侀珨涓殑绲曞皪(du矛)澹撳姏鐐�2.3鍗冪墰闋�/绫�2銆� 47.5鍗冪墰闋�/绫�2鐨勭禃灏�(du矛)澹撳姏涓�锛屽湪80鈩冪殑姘撮枊濮嬫哺楱般�� 鍦ㄧ禃灏�(du矛)澹撳姏鐐�101.3鍗冪墰/绫�2锛堝父澹擄級锛屾哺榛�(di菐n)鍦�100鈩冮枊濮�銆�
鍑堟鍚稿叆澹撻牠 - 姹借潟浣欓噺
鍑堟鍚搁牠 - 姹借潟浣欓噺 - 鍙〃绀虹偤鍚搁牠鍜屾恫楂旇捀姘ｉ牠涔嬮枔鐨勫樊鐣�锛屽苟琛ㄧず鍍�
姹借潟浣欓噺= H S - H V锛�3锛�
鎴�锛岄�氶亷绲勫悎锛�1锛夊拰锛�2锛�
姹借潟浣欓噺= P S /γ+ V S 2/2 G - P V /γ锛�3B锛�
鍙敤鐨勬苯铦曚綑閲�-姹借潟浣欓噺涓�鍊�(g猫)鎴朜PSHA
鍑堟鍚搁牠娉靛惛绯荤当(t菕ng)閫氬父琚ū鐐烘苯铦曚綑閲忎竴鍊�(g猫) 銆� 姹借潟浣欓噺鍙互鍦ㄨō(sh猫)瑷�(j矛)鍜屽缓瑷�(sh猫)閬庣▼涓⒑瀹�锛屽緸瀵�(sh铆)闅涚殑鐗╃悊绯荤当(t菕ng)鎴�?q奴)宥�?y脿n)纰哄畾銆�
鍙互瑷�(j矛)绠楀嚭涓�鍊�(g猫)鍙敤鐨勬苯铦曚綑閲忚兘閲忔柟绋� 銆� 鐐轰簡涓�鍊�(g猫)鍏卞悓鐨勬噳(y墨ng)鐢ㄧ▼搴� - 姘存车鐨勬彋(y谩ng)绋嬫祦楂斿緸涓婇潰涓�灞ょ殑鍏朵粬鐨勯枊鏀惧紡姘寸锛岄牠缃愮殑琛ㄩ潰鐨勮兘閲忔垨鍦ㄦ车钁夎吉鐨勮兘閲忔垨闋墠鐨勭浉鍚�锛屽苟鍙互琛ㄧず鐐猴細
H 0 = H + H L锛�4锛�
灏忔檪(sh铆)0 = 闋〃闈�
H S = 闋憠杓墠
H L = 闋緸琛ㄩ潰娴佸け鐨勮憠杓�-鍚稿叆绠＄殑涓昏鍜屾瑕佺殑鎼嶅け
鍦ㄤ竴鍊�(g猫)闁嬫斁鐨勬Ы闋〃闈㈠彲浠ヨ〃绀虹偤锛�
灏忔檪(sh铆)0 = 0 /γ= P atm涔�/γ锛�4B锛�
灏�(du矛)浜庝竴灏侀枆鍔犲缃愮殑绲曞皪(du矛)闈滄厠(t脿i)缃愬収(n猫i)澹撳姏蹇呴爤琚娇鐢�銆�
钁夎吉鍓嶉牠閮ㄥ彲浠ヨ〃绀虹偤锛�
H S = P S /γ+ V S 2 /2鍏�銆�+ H E锛�4C锛�
H E =娴锋嫈寰炶〃闈㈡车-姝ｆ车缃愪互涓婏紝璨�(f霉)锛屽鏋滄车浣庝簬娌圭
杞�(zhu菐n)鍖栵紙4锛夛紙鍦�4b锛夊拰锛�4c锛変腑锛�
/ P atm涔�γ= P S /γ+ V S 2/2鍏�+ H E + H L锛�4d鐨勶級
钁夎吉鍓嶉牠閮ㄥ彲浠ヨ〃绀虹偤锛�
P S /γ+ V S 2 /2鍏�銆�= P ATM /γ - H E - H L锛�4E锛�
鎴栦綔鐐哄彲鐢ㄧ殑姹借潟浣欓噺锛�
姹借潟浣欓噺涓�鍊�(g猫) = ATM /γ - HÉ - H L - P V /γ锛�4F锛�
鍙敤鐨勬苯铦曚綑閲�-娉典笂闈㈢殑鍧﹀厠
濡傛灉娉垫补绠变笂鏂�锛屾捣鎷�- H E -鏄⿳妤电殑锛� 涓�鍊�(g猫)姹借潟浣欓噺闄嶄綆娴锋嫈娉靛鍔�銆�
鍦ㄤ竴瀹氱▼搴︿笂鐨勫噲鍚稿叆澹撳樊锛圢PSH锛夊皣琚笡灏戝埌闆�锛屾恫楂旈枊濮嬭捀鐧�(f膩)銆�
鍙敤姹借潟浣欓噺-娉靛湪娌圭涓嬫柟
濡傛灉娉电殑浣嶇疆鍦ㄦ补绠变笅鏂癸紝娴锋嫈- H E -鏄矤(f霉)鐨�锛� 涓�鍊�(g猫)姹借潟浣欓噺澧炲姞锛岀暥(d膩ng)娉电殑璺屽箙锛堟捣鎷旈檷浣庢车锛�銆�
瀹冪附鏄兘澶犲鍔犱竴鍊�(g猫)閫氶亷闄嶄綆娉碉紙鐢变簬绠￠亾鐐轰竴鍊�(g猫)杓冮暦(zh菐ng)鐨勪富瑕佸拰娆¤鐨勬按闋悕澶� 锛屽彧瑕佷笉澧炲姞锛夌殑姹借潟浣欓噺銆� 閫欐槸閲嶈鐨�锛屼互闄嶄綆娉垫车閫佹祦楂旀帴杩戣捀鐧�(f膩)婧害鏅�(sh铆)锛屽畠鏄父瑕嬬殑銆�
蹇呴渶姹借潟浣欓噺-姹借潟浣欓噺r鎴� NPSHR
姹借潟浣欓噺?鐨� 锛岀ū鐐烘车鎵�瑕佹眰鐨勫噲鍚搁牠锛屼互闃叉姘ｈ潟娉甸亱(y霉n)琛屽畨鍏ㄥ彲闈犮��
鎵�闇�NPSH r鐐轰竴鍊�(g猫)鐗瑰畾鐨勬车鏄湪鏅�氭车鐨勫埗閫犲晢 锛屾车鐨勬枃妾旂殑涓�閮ㄥ垎锛岀敱瀵�(sh铆)椹�(y脿n)纰哄畾銆�
涓�鍊�(g猫)绯荤当(t菕ng)鍙敤鐨勬苯铦曚綑閲忔噳(y墨ng)濮嬬祩瓒呭嚭鎵�闇�NPSH?鐨勬车钁夎吉鐨勭溂鐫涳紝浠ラ伩鍏嶈捀鐧�(f膩)鍜屾苯铦�銆� 鍙敤鐨勬苯铦曚綑閲忎竴鍊�(g猫)涓�鑸噳(y墨ng)椤憲楂樹簬鎵�闇�NPSH?锛岄伩鍏嶅惛鍏ョ鍜屾车娈�锛屾按闋悕澶�锛屽眬閮ㄩ�熷害鍔犻�熷害鍜屽鍔涙笡灏�锛岄枊濮嬫哺楱扮殑娴侀珨鍦ㄨ憠杓〃闈���
闇�瑕佹敞鎰忕殑鏄墍闇�NPSH?鐨勫鍔犲閲忕殑鏂�銆�
闆欏惛钁夎吉娉靛叿鏈夎純浣庢苯铦曚綑閲�?鐨勬瘮鍠惛钁夎吉娉�銆� 闆欏惛钁夎吉鐨勬车鑸囨恫澹撳钩琛�锛屼絾琚獚(r猫n)鐐烘槸鏄撳彈鍏╁伌(c猫)涓嶅潎鍕绘祦鐢ㄤ笉姝ｇ暥(d膩ng)绠″伐浣�銆�
鑸変緥 - 寰為枊鏀惧紡姘寸鎶芥按
鍦ㄧ綈涓婃柟鐨勬车澧炲姞浠拌鏅�(sh铆)锛屾祦楂斿皣闁嬪钂哥櫦(f膩)锛屽湪鏈�楂樻按骞崇殑瀵�(sh铆)闅涙韩搴�銆�
涓婇潰鐨勬渶楂樻捣鎷旂殑NPSH a鏄�0銆� 鍥犳锛屽彲浠ユ渶楂樻捣鎷旓紙绫筹級琛ㄧず锛�
姹借潟浣欓噺涓�鍊�(g猫) = ATM /γ - H E - H L - P V /γ= 0
鐐轰簡鐛插緱鏈�浣崇殑鐞嗚珫姊濅欢涓�锛屾垜鍊戝拷鐣ヤ簡涓昏鐨勫拰娆¤鐨勬按闋悕澶便�� 鎶珮闋彲浠ヨ琛ㄧず鐐猴細
H E = ATM /γ - P V /γ锛�5锛�
闁嬫斁寮忔按绠辨渶楂樻捣鎷旀垨鎶藉惛闋彇姹轰簬澶ф埃澹� -閫欏湪涓�鑸彲瑕栫偤甯告暩(sh霉)锛屾祦楂�-涓�鑸毃婧害鑰岃畩鍖�锛屽挨鍏舵槸灏�(du矛)姘寸殑钂告埃澹�銆�
绲曞皪(du矛)钂告埃澹撴按婧害 20鈩� 鏄�2.3鍗冪墰闋�/绫�2銆� 鍥犳锛岀悊璜栦笂鐨勬渶澶ф捣鎷旈珮搴︽槸锛�
H E =锛�101.33鍗冪墰/绫�2锛�/锛�9.80鍗冪墰/绫�3锛� - 锛�2.3鍗冪墰/绫�2锛�/锛�9.80鍗冪墰/绫�3锛�
=10.1绫�
鐢变簬澹撻牠鎼嶅け鍦ㄥ惛鍏ョ鍜屾车鍏�(n猫i)鐨勭暥(d膩ng)?sh霉)璨浠� - 鐞嗚珫鐨勬渶楂樻捣鎷旂殑椤憲涓嬮檷銆�
寰炰笅琛ㄤ腑鍙互鐧�(f膩)鐝�(xi脿n)鍦ㄤ笉鍚屾韩搴︿笅鐨勪竴鍊�(g猫)闁嬫斁鐨勬按妲戒笂闈㈢殑娉电殑鏈�澶х悊璜栨捣鎷�銆�
鍚搁牠鍙楁韩搴﹀奖闊�
|
婧害 |
钂告埃澹� |
鏈�澶с�� 娴锋嫈 |
|
锛圤 C锛� |
锛圤 F锛� |
锛堝崈鐗涢爴/绫�2锛� |
锛圡锛� |
锛團T锛� |
|
0 |
32 |
0.6 |
10.3 |
33.8 |
|
5 |
41 |
0.9 |
10.2 |
33.5 |
|
10 |
50 |
1.2 |
10.2 |
33.5 |
|
15 |
59 |
1.7 |
10.2 |
33.5 |
|
20 |
68 |
2.3 |
10.1 |
33.1 |
|
25 |
77 |
3.2 |
10.0 |
32.8 |
|
30 |
86 |
4.3 |
9.9 |
32.5 |
|
35 |
95 |
5.6 |
9.8 |
32.2 |
|
40 |
104 |
7.7 |
9.5 |
31.2 |
|
45 |
113 |
9.6 |
9.4 |
30.8 |
|
50 |
122 |
12.5 |
9.1 |
29.9 |
|
55 |
131 |
15.7 |
8.7 |
28.5 |
|
60 |
140 |
20 |
8.3 |
27.2 |
|
65 |
149 |
25 |
7.8 |
25.6 |
|
70 |
158 |
32.1 |
7.1 |
23.3 |
|
75 |
167 |
38.6 |
6.4 |
21 |
|
80 |
176 |
47.5 |
5.5 |
18 |
|
85 |
185 |
57.8 |
4.4 |
14.4 |
|
90 |
194 |
70 |
3.2 |
10.5 |
|
95 |
203 |
84.5 |
1.7 |
5.6 |
|
100 |
212 |
101.33 |
0.0 |
0 |
鎶芥按纰�?x矛)娴狀嚡琛�?/h3>
瑕佺煡閬�锛屼竴鑸敱鍒堕�犲晢鎻愪緵鐨勬苯铦曚綑閲忚(gu墨)鑼冧娇鐢ㄥ喎姘� 銆� 纰�?x矛)娴狀嚡琛�?锛岄�欎簺鍊煎繀闋堥檷浣庤�冩叜鍒板京(f霉)闆滅殑鏈夋(j墨)娑查珨鐨勮捀姘ｉ噵鏀炬�ц兘銆�
|
娴侀珨 |
婧害锛堚剝锛� |
钂告埃澹擄紙kPa绲曪級 |
|
涔欓唶 |
20 |
5.9 |
|
65 |
58.2 |
|
閱嬮吀鐢查叝 |
20 |
22.8 |
|
55 |
93.9 |
璜�(q菒ng)娉ㄦ剰锛岄�氶亷娉甸牠闁嬬櫦(f膩)鐛�(d煤)绔嬬殑娑查珨锛屽彲鐢ㄤ簬鐗涢爴娑查珨锛屽姹芥补锛屾煷娌规垨椤炰技鐨勬按寰炲埗閫犲晢鐨勬�ц兘鏇茬窔銆� 瑕佺煡閬撴墍闇�鐨勫姛鐜囧彇姹轰簬娑查珨鐨勫瘑搴�锛屽繀闋堥��(j矛n)琛岃(di脿o)鏁�銆�
娉夐仈(d谩)绠￠亾娉靛皥妤�(y猫)寤犲
鐩搁棞(gu膩n)鐢�(ch菐n)鍝侊細
ISG鍨嬬郴鍒楀柈绱�(j铆)绠￠亾闆㈠績娉� ISW鑷ュ紡绠￠亾闆㈠績娉� SG鍨嬪柈绱�(j铆)绠￠亾澧炲娉�
SGR绯诲垪绔嬪紡鐔辨按绠￠亾娉� CDLF鍨嬩笉閵归嫾绔嬪紡澶氱礆(j铆)绠￠亾娉�
|
