MACH NUMBER TABLES (GAMMA = 1.4) WITH CORRECTION FACTORS FOR REAL AIR.
Abstract
This memorandum is composed of three tables, along with a brief description of each. It is well known that the common Mach tables for air (gamma = 1.4) are accurate only if the temperature of the flow is everywhere comparatively low. In order to increase the usefulness of these tables, certain auxiliary tables of correction factors have been constructed which give satisfactory results over a wide range of total temperatures and pressures. These auxiliary tables apply a correction factor to the common Mach tables and must therefore be used in conjunction with them. The factors are very easy to apply and they greatly increase the accuracy of the ordinary Mach tables within the limits of the assumptions made. TABLE I: Thirteen Mach functions useful in flow analysis are tabulated over a wide range of Mach number values: O< or = M< or = 25. Both the isentropic and the normal shock functions are included. All results are based on gamma = 1.4. TABLE II: This table lists correction factors for the Mach functions of Table I associated with the isentropic flow of real air. It covers the ranges: .1< or = P(atm)< or = 500; 900 < or = T(R)< or = 12,600; O2 or = M< or = (5-25). TABLE III: This table is similar to Table II, except it lists the correction factors for the Mach functions of Table I associated with the flow of real air across a normal shock. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 09, 1964
- Accession Number
- AD0624598
Entities
People
- H. C. Kerr
Organizations
- General Dynamics