TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Mennenöh, Hartwig
T1  - Eine neue Interpretation und elementare Abschätzung für den Internen Zinsfuß
N2  - In diesem Beitrag werden im ersten Teil eine neue Definition und damit zugleich auch eine neue Interpretation des Internen Zinsfußes vorgestellt. Ausgehend von dieser neuartigen Basis wird im zweiten Teil eine neue, elementare Schätzgleichung für den konkreten Zahlenwert des internen Zinsfußes hergeleitet.
N2  - A new Interpretation and an elementary Estimation of the Internal Rate of Return

This paper solves two practical problems in applying the Internal Rate of Return (IRR). Firstly, a new, very transparent definition for the first time enables a clear, intuitive understanding of the IRR. Secondly, a new elementary estimation formula for the first time avoids the great iterative computational effort in determining the numerical value of the IRR.
KW  - Interner Zinsfuß
KW  - Interpretation
KW  - Abschätzung
KW  - Berechnung
Y1  - 2023
U6  - https://nbn-resolving.org/urn:nbn:de:hbz:dm13-33407
UN  - https://nbn-resolving.org/urn:nbn:de:hbz:dm13-33407
SP  - 22
S1  - 22
ER  - 
TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Lattner, Yannick
A1  - Geller, Marius
T1  - Radial Turbocompressor Chord Length Approximation for the Reynold's Number Calculation
N2  - We present an approximation model for the chord length of radial turbocompressors. The model enables the calculation of a compressor's chord Reynold's number during the machine design process. The chord Reynold's number is shown to be the most accurate representation of the fluid dynamic properties inside the radial turbocompressor's impeller. It — however — requires the computation of the chord length, which is only available after defining the final impeller geometry. The method presenting in this paper only employs the compressors principal dimensions to approximate the chord length. The chord is modelled using a Bézier spline and quarter ellipse. This enables the earlier use of the chord Reynold's number during the machine design process of radial turbocompressors.
KW  - Strömungsmaschine , Reynolds-Zahl
KW  - Radial turbocompressors
KW  - Reynold's number
KW  - Turbomachinery
KW  - Design methods
Y1  - 2023
UN  - https://nbn-resolving.org/urn:nbn:de:hbz:dm13-33351
U6  - https://doi.org/10.26205/opus-3335
DO  - https://doi.org/10.26205/opus-3335
ER  -