एक अंतर्मुखी प्रवाह अभिक्रिया टरबाइन के लिए निम्नलिखित आंकड़े दिए गए हैं:

उपलब्ध शीर्ष = 25 मीटर

प्रवाह का वेग = 2.5 मीटर/सेकंड (नियत)

गाइड ब्लेड कोण = 10°

रनर वेन इनलेट पर त्रिज्यीय हैं और आउटलेट पर निरावेशन त्रिज्यीय है। टरबाइन की अनुमानित द्रवीय दक्षता क्या होगी? [ दिया गया है, , g = 10 मीटर/सेकंड²]

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  1. 95.34%
  2. 70.23%
  3. 61.32%
  4. 81.63%

Answer (Detailed Solution Below)

Option 4 : 81.63%
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संकल्पना:

एक अभिक्रिया टरबाइन के लिए द्रवीय दक्षता इस प्रकार दी जाती है:

\( \eta_h = \frac{V_{w1} \cdot u_1}{gH} \)

दिया गया है:

\( H = 25~m,~V_f = 2.5~m/s,~\alpha = 10^\circ \Rightarrow \tan \alpha = 0.176,~g = 10~m/s^2 \)

चरण 1: भँवर वेग

\( V_{w1} = \frac{V_f}{\tan \alpha} = \frac{2.5}{0.176} \approx 14.2~m/s \)

चरण 2: स्पर्शीय वेग

\( u_1 = V_{w1} = 14.2~m/s \) (चूँकि त्रिज्यीय वेन, कोई नुकसान नहीं माना गया)

चरण 3: द्रवीय दक्षता

\( \eta_h = \frac{14.2 \times 14.2}{10 \times 25} = \frac{201.64}{250} = 0.8163 = 81.63\% \)

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