鍦ㄤ竴鑷烘车鐨勫惛鍏ュ伌鐨勫鍔涗綆锛屽彲鑳芥渻閬囧埌娴侀珨娌搁ò锛屽彲鑳芥渻灏庤嚧
娌搁ò闁嬪鏅傦紝鍦ㄦ恫楂斾腑鐨勫鍔涢檷浣庣殑娴侀珨鐨勫闅涙韩搴︿笅鐨勮捀姘ｅ銆�
鐐轰簡琛ㄥ緛娼涘湪鐨勬哺榛炲強姘ｈ潟锛屽湪娉电殑鍚稿叆鍋翠笂鐨勭附澹撻牠 - 闈犺繎钁夎吉锛屽拰娑查珨鐨勫闅涙韩搴︿笅鐨勮捀姘ｅ涔嬮枔鐨勫樊鍒ワ紝閮藉彲浠ヤ娇鐢ㄣ��
鍚搁牠
鍦ㄩ潬杩戣憠杓殑娴侀珨鐨勮兘閲忔柟绋� - 鎶藉惛闋殑鍩虹涓婄殑闈滄厠鍜岄�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﹂殯婧害涓嬬殑娑查珨鐨勮捀姘ｅ彲浠ヨ〃绀虹偤锛�
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旓紝鍦�20鈩冮枊濮嬫哺楱帮紝濡傛灉鍦ㄦ祦楂斾腑鐨勭禃灏嶅鍔涚偤2.3鍗冪墰闋�/绫�2銆� 47.5鍗冪墰闋�/绫�2鐨勭禃灏嶅鍔涗笅锛屽湪80鈩冪殑姘撮枊濮嬫哺楱般�� 鍦ㄧ禃灏嶅鍔涚偤101.3鍗冪墰/绫�2锛堝父澹擄級锛屾哺榛炲湪100鈩冮枊濮嬨��
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牠涔嬮枔鐨勫樊鐣帮紝骞惰〃绀哄儚
姹借潟浣欓噺= H S - H V锛�3锛�
鎴栵紝閫氶亷绲勫悎锛�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�鍊嬫垨NPSHA
鍑堟鍚搁牠娉靛惛绯荤当閫氬父琚ū鐐烘苯铦曚綑閲忎竴鍊� 銆� 姹借潟浣欓噺鍙互鍦ㄨō瑷堝拰寤鸿ō閬庣▼涓⒑瀹氾紝寰炲闅涚殑鐗╃悊绯荤当鎴栧椹楃⒑瀹氥��
鍙互瑷堢畻鍑轰竴鍊嬪彲鐢ㄧ殑姹借潟浣欓噺鑳介噺鏂圭▼ 銆� 鐐轰簡涓�鍊嬪叡鍚岀殑鎳夌敤绋嬪簭 - 姘存车鐨勬彋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岋紝骞跺彲浠ヨ〃绀虹偤锛�
H 0 = H + H L锛�4锛�
灏忔檪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竴鍊嬮枊鏀剧殑妲介牠琛ㄩ潰鍙互琛ㄧず鐐猴細
灏忔檪0 = 0 /γ= P atm涔�/γ锛�4B锛�
灏嶄簬涓�灏侀枆鍔犲缃愮殑绲曞皪闈滄厠缃愬収澹撳姏蹇呴爤琚娇鐢ㄣ��
钁夎吉鍓嶉牠閮ㄥ彲浠ヨ〃绀虹偤锛�
H S = P S /γ+ V S 2 /2鍏嬨��+ H E锛�4C锛�
H E =娴锋嫈寰炶〃闈㈡车-姝ｆ车缃愪互涓婏紝璨狅紝濡傛灉娉典綆浜庢补绠�
杞夊寲锛�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鍏嬨��= 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� = 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癸紝娴锋嫈- H E -鏄⿳妤电殑锛� 涓�鍊嬫苯铦曚綑閲忛檷浣庢捣鎷旀车澧炲姞銆�
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讹紝娑查珨闁嬪钂哥櫦銆�
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 -鏄矤鐨勶紝 涓�鍊嬫苯铦曚綑閲忓鍔狅紝鐣舵车鐨勮穼骞咃紙娴锋嫈闄嶄綆娉碉級銆�
瀹冪附鏄兘澶犲鍔犱竴鍊嬮�氶亷闄嶄綆娉碉紙鐢变簬绠￠亾鐐轰竴鍊嬭純闀风殑涓昏鍜屾瑕佺殑姘撮牠鎼嶅け 锛屽彧瑕佷笉澧炲姞锛夌殑姹借潟浣欓噺銆� 閫欐槸閲嶈鐨勶紝浠ラ檷浣庢车娉甸�佹祦楂旀帴杩戣捀鐧兼韩搴︽檪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潟娉甸亱琛屽畨鍏ㄥ彲闈犮��
鎵�闇�NPSH r鐐轰竴鍊嬬壒瀹氱殑娉垫槸鍦ㄦ櫘閫氭车鐨勫埗閫犲晢 锛屾车鐨勬枃妾旂殑涓�閮ㄥ垎锛岀敱瀵﹂纰哄畾銆�
涓�鍊嬬郴绲卞彲鐢ㄧ殑姹借潟浣欓噺鎳夊绲傝秴鍑烘墍闇�NPSH?鐨勬车钁夎吉鐨勭溂鐫涳紝浠ラ伩鍏嶈捀鐧煎拰姹借潟銆� 鍙敤鐨勬苯铦曚綑閲忎竴鍊嬩竴鑸噳椤憲楂樹簬鎵�闇�NPSH?锛岄伩鍏嶅惛鍏ョ鍜屾车娈硷紝姘撮牠鎼嶅け锛屽眬閮ㄩ�熷害鍔犻�熷害鍜屽鍔涙笡灏忥紝闁嬪娌搁ò鐨勬祦楂斿湪钁夎吉琛ㄩ潰銆�
闇�瑕佹敞鎰忕殑鏄墍闇�NPSH?鐨勫鍔犲閲忕殑鏂广��
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点�� 闆欏惛钁夎吉鐨勬车鑸囨恫澹撳钩琛★紝浣嗚瑾嶇偤鏄槗鍙楀叐鍋翠笉鍧囧嫽娴佺敤涓嶆鐣剁宸ヤ綔銆�
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傦紝娴侀珨灏囬枊濮嬭捀鐧硷紝鍦ㄦ渶楂樻按骞崇殑瀵﹂殯婧害銆�
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� = 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嬶紝鎴戝�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�鑸彲瑕栫偤甯告暩锛屾祦楂�-涓�鑸毃婧害鑰岃畩鍖栵紝灏ゅ叾鏄皪姘寸殑钂告埃澹撱��
绲曞皪钂告埃澹撴按婧害 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х殑鐣跺湴姊濅欢 - 鐞嗚珫鐨勬渶楂樻捣鎷旂殑椤憲涓嬮檷銆�
寰炰笅琛ㄤ腑鍙互鐧肩従鍦ㄤ笉鍚屾韩搴︿笅鐨勪竴鍊嬮枊鏀剧殑姘存Ы涓婇潰鐨勬车鐨勬渶澶х悊璜栨捣鎷斻��
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 |
鎶芥按纰虫矮鍖栧悎鐗�
瑕佺煡閬擄紝涓�鑸敱鍒堕�犲晢鎻愪緵鐨勬苯铦曚綑閲忚鑼冧娇鐢ㄥ喎姘� 銆� 纰虫矮鍖栧悎鐗╋紝閫欎簺鍊煎繀闋堥檷浣庤�冩叜鍒板京闆滅殑鏈夋娑查珨鐨勮捀姘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 |
璜嬫敞鎰忥紝閫氶亷娉甸牠闁嬬櫦鐛ㄧ珛鐨勬恫楂旓紝鍙敤浜庣墰闋撴恫楂旓紝濡傛苯娌癸紝鏌存补鎴栭浼肩殑姘村緸鍒堕�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︼紝蹇呴爤閫茶瑾挎暣銆�
娉夐仈绠￠亾娉靛皥妤粻瀹�
鐩搁棞鐢㈠搧锛�
ISG鍨嬬郴鍒楀柈绱氱閬撻洟蹇冩车 ISW鑷ュ紡绠￠亾闆㈠績娉� SG鍨嬪柈绱氱閬撳澹撴车
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绠￠亾娉�
|
